Diabetes Care Instructions for Authors
Last updated on November 19, 2013.

Download these instructions in PDF format.

Beginning with manuscripts submitted after Jan. 1, 2013, Diabetes Care requires authors to report HbA1c levels in both traditional, DCCT-derived units (as %) and SI, IFCC-recommended units (as mmol/mol). Authors should use the NGSP converter for HbA1c, available at http://www.ngsp.org/convert1.asp, to calculate HbA1c values as both % and mmol/mol. (Please note the additional link available for converting standard deviations.) Values should first be reported as %, followed by the mmol/mol equivalent in parentheses.

1. ABOUT THE JOURNAL
2. POLICIES

3. EDITORIAL OFFICE CONTACT INFORMATION
4. FORMS AND REQUIREMENTS
5. MANUSCRIPT CATEGORIES

6. MANUSCRIPT FORMAT AND STYLE
7. SUBMITTING A MANUSCRIPT
8. ACCEPTED MANUSCRIPTS
9. FINANCIAL OBLIGATIONS

Diabetes Care takes only online manuscript submissions. The submission site can be found at http://mc.manuscriptcentral.com/diabetescare. Please read all instructions carefully. Failure to follow the submission instructions may delay the review process.


1. ABOUT THE JOURNAL

Diabetes Care is a journal for the health care practitioner that is intended to increase knowledge, stimulate research, and promote better management of people with diabetes. To achieve these goals, the journal publishes Original Articles on human studies in the following categories:
1) Clinical Care/Education/Nutrition/Psychosocial Research
2) Epidemiology/Health Services Research
3) Pathophysiology/Complications
4) Cardiovascular and Metabolic Risk

The journal also publishes clinically relevant review articles, letters to the editor, and commentaries. Topics covered are of interest to clinically oriented physicians, researchers, epidemiologists, psychologists, diabetes educators, and other health professionals. The journal does not publish descriptions of study designs without data, papers on in vitro studies, or studies involving animals.

The editor-in-chief of Diabetes Care, William T. Cefalu, MD, began his term with the January 2012 issue. Dr. Cefalu's editorial team began reviewing first submissions on July 1, 2011.

2. POLICIES

The American Diabetes Association's Publications Policy Committee follows the recommendations of the International Committee of Medical Journal Editors (ICMJE), the World Association of Medical Editors (WAME), and the Committee on Publication Ethics (COPE) for guidance on policies and procedures related to publication ethics. The policies for Diabetes Care have been adopted from those three advisory bodies and, where necessary, modified and tailored to meet the specific content, audiences, and aims of Diabetes Care. Comprehensive information related to the editorial and ethical policies of Diabetes Care can be found in Publication Policies and Procedures for Diabetes Care. The Association's Publications Policy Committee or Subcommittee on Ethical Scientific Publications will consider on a case-by-case basis policies that are not addressed in the policies document, which contains information related to the following topics:

  • Study Design
  • Originality and Prior Publication
  • Authorship and Contributions
  • Acknowledgments
  • Conflict of Interest
  • Data Access and Responsibility
  • Clinical Trials, Systematic Reviews, and Meta-Analyses
  • Plagiarism
  • Digital Image Manipulation
  • Responses to Possible Scientific Misconduct
  • Peer Review
  • Editorial Decisions
  • Prepublication of Accepted Articles
  • Reuse, Post-Prints, and Public Access
  • Errata
  • Media Embargos
  • Advertising
  • Supplements

Frequently referenced segments of the document appear below.

2.1.Diabetes Care publishes only material that has not been published previously (either in print or electronically) and is not under consideration for publication elsewhere, with the exception of an abstract that is less than 400 words in length. Prior presentation of data (e.g., at a scientific meeting or via webcast) does not preclude publication in Diabetes Care, but should be disclosed in the Acknowledgments of the paper and in the author's comments to the editor upon manuscript submission. All submissions to the journal will be scanned for possible duplicate or prior publication using the CrossCheck/iThenticate plagiarism detection system (www.ithenticate.com). Any article that eclipses a certain similarity threshold with another article will be closely reviewed by ADA. Authors who submit previously published work to the journal will be banned from submitting future manuscripts to the journal, and their funding body and/or institution will be notified.

All contributions, including solicited articles and symposia, are critically reviewed by the editors and/or invited referees. Reviewers' comments are usually provided to the authors. The decision of the editors is final.

2.2. Prepublication of Research Articles. To make new research readily available to subscribers, Diabetes Care publishes original research articles online ahead of print before the print/online issue becomes available.

Online Ahead of Print articles are citable by their unique DOI (digital object identifier). DOIs for Diabetes Care articles begin with 10.2337, followed by the article number assigned when the manuscript was submitted online via the manuscript submission system. (e.g., 10.2337/dc13-1234)

Example: Kohler C, Norton H, Such V, Baldino N: How to cite a prepublished article in ADA journals. Diabetes Care 10.2337/dc13-1234. Accessed [insert date]

2.3. Embargo Policy. If you are interested in reporting on a Diabetes Care article published online ahead of print, please read the article embargo policy for specific instructions and conditions. Articles that were not prepublished are embargoed until they appear in a final issue of Diabetes Care Online.

2.4. Public Access Policy. As a courtesy to authors, the final print versions of articles funded by NIH will be deposited in PubMed Central (PMC) at no additional cost. In compliance with NIH’s policy, these articles will appear on PMC 12 months after print publication in Diabetes Care. All articles, regardless of funding body, are delivered to PubMed for inclusion in the PubMed index. 

Full-text HTML versions of all articles are freely accessible on Diabetes Care Online (care.diabetesjournals.org) 6 months after the print publication date, and PDF content becomes freely accessible 12 months after the print publication date. Authors may submit the accepted version of their manuscript to their funding body’s repository immediately upon acceptance.

2.5. Clinical Trials. The International Committee of Medical Journal Editors (ICMJE) defines a clinical trial as “any research study that prospectively assigns human participants or groups of humans to one or more health-related interventions to evaluate the effects on health outcomes.” All clinical trials submitted to Diabetes Care must be registered with an approved ICMJE clinical trial registry (ClinicalTrials.gov, www.ISRCTN.org, www.actr.org.au, www.umin.ac.jp, and www.trialregister.nl). Diabetes Care accepts registration of clinical trials in any of the primary registries that participate in the WHO International Clinical Trial Registry Platform. Posting clinical trial results exceeding more than 500 words in a clinical trials registry is considered prior publication. Posting results in the form of a structured abstract (less than 500 words) or table is not considered prior publication. For definitions and further information, please see ICMJE’s clinical trials registration policy found in the Uniform Requirements for Manuscripts Submitted to Biomedical Journals. Please be sure to include the unique trial number and the name of the registry (e.g., NCTXXXXXXXX, ClinicalTrials.gov; or ISRCTNXXXXXXXX, www.ISRCTN.org) on the manuscript's title page.

3. EDITORIAL OFFICE CONTACT INFORMATION

Diabetes Care Editorial Office
5110 Commerce Square Dr., Suite G
Indianapolis, IN 46237
phone: (317) 354-1508, ext 1782 fax: (317) 859-3592
e-mail: diabetescare{at}diabetes.org

Lyn Reynolds, Director, Editorial Office
Shannon Potts and Jane Lucas, Peer Review Managers
Rita Summers, Editorial Assistant
Joan Garrett, Editorial Secretary
Rachel Castillo, Editorial Secretary

4. FORMS AND REQUIREMENTS

4.1. The Manuscript Submission Form addresses ADA’s policies on 1) originality and authorship, 2) copyright assignment, and 3) potential conflict of interest and outlines the Association’s permission policies related to reuse and post prints. ADA will also accept ICMJE's Uniform Disclosure Form for Potential Conflicts of Interest. The corresponding author may complete the form on behalf of all authors.

Corresponding authors are encouraged to scan and upload the form to the manuscript submission site with their article files. If this is not possible, the corresponding author may fax (317-859-3592) or e-mail (EditorialOffice@diabetes.org) the completed form for all authors to the Editorial Office immediately after submission. Submissions will not be considered complete until the form has been received.

4.1.2. Statement of Originality and Authorship. Diabetes Care subscribes to the requirements stated in the Uniform Requirements for Manuscripts Submitted to Biomedical Journals that authorship implies substantial contributions to conception and design or analysis and interpretation of data and drafting of the article or critical revision for important intellectual content. The editor reserves the right to query authorship contribution.

Any requested changes to authorship (addition or removal of an author) after the initial submission of a manuscript should be made in writing to the EditorialOffice{at}diabetes.org?subject=Change%20in%20Authorship. The new author list must be provided, along with a justification for the change. The author(s) being added or removed should send separate correspondence consenting to the change.

4.1.3. Copyright Assignment. The American Diabetes Association holds the copyright on all material appearing in Diabetes Care, unless the content is produced by an employee of the U.S. government as part of the authors’ official duties. The corresponding author must check the appropriate box on the Manuscript Submission Form, which transfers copyright to the ADA in accordance with the Copyright Revision Act of 1976.

4.1.4. Conflict of Interest. Please read the ADA Policy Statement on Duality of Interest and check the box for Potential Conflict of Interest Disclosure on the Manuscript Submission Form.

In addition to completing the Manuscript Submission Form, all submitted papers must include a conflict-of-interest statement for all authors in the Acknowledgments section. If authors have no relevant conflict of interest to disclose, this should be indicated in the Acknowledgments section. Relevant conflict of interest (or lack thereof) should also be disclosed in the authors' comments to the editor during the submission process.

4.5. Author Contributions. Authors are required to include a paragraph in the Acknowledgments section listing each author’s

Example: “C.K. researched data. L.R. wrote the manuscript and researched data. H.N. reviewed/edited the manuscript. V.S. contributed to the discussion and reviewed/edited the manuscript. N.B. researched data and contributed to discussion. V.G. wrote the manuscript.”

4.6. Writing Groups. The names of members of writing groups should be listed at the end of the paper in the Acknowledgments section (if no more than two or three short paragraphs) or in a separate supplemental online-only file.

4.7. Affiliations. Institutional and/or employment affiliations of all authors should be listed on the title page of the manuscript. In addition, when citing “editorial assistance” or help provided by a colleague, authors are required to list the employer/institution with which that colleague is affiliated.

Example: “The authors acknowledge the editorial assistance of Mark Smith, Global Informatics, Inc.”; “The authors thank Mark Smith, Global Informatics, Inc., for help with preparing the manuscript.”

4.8. Reuse. Authors are permitted to reuse portions of their ADA-copyrighted work in their own work, including tables and figures, and to reuse portions or all of their ADA-copyrighted work for lecture or classroom purposes, provided that the proper citation and copyright information is given.

4.9. Post-Prints. Authors are permitted to submit the accepted version of their manuscript to their funding body or institution for inclusion in that funding body or institution’s database, archive, or repository, or to post the accepted version on their personal Web site. These manuscripts may be made freely accessible to the public upon acceptance, provided that the following two conditions are observed:

First, post-prints must include the following statement of provenance and, once the final version has been published in the journal, a link to the final published version of the paper on the journal's Web site:

This is an author-created, uncopyedited electronic version of an article accepted for publication in Diabetes Care. The American Diabetes Association (ADA), publisher of Diabetes Care, is not responsible for any errors or omissions in this version of the manuscript or any version derived from it by third parties. The definitive publisher-authenticated version will be available in a future issue of Diabetes Care in print and online at http://care.diabetesjournals.org.

Second, the version of the manuscript deposited or posted must be identical to the final accepted version, with the exception of the addition of the above statement and any changes necessary to correct errors. Authors may make changes to the posted version to correct mistakes or may issue an erratum at any time. However, the final published version of the manuscript may not be deposited, posted, or later substituted for the post-print.

5. MANUSCRIPT CATEGORIES

See Section 6, Manuscript Format and Style, for detailed instructions on formatting documents.

5.1. Original Articles. Original Articles should be arranged in the following order: title page, structured abstract, introduction (no heading), “Research Design and Methods,” “Results,” “Conclusions,” “Acknowledgments,” “References,” tables, and figure legends.

A structured abstract is required for all Original Articles. Abstracts for an Original Article should not exceed 250 words. (This is not to be confused with abstracts submitted to the Annual Scientific Meeting, for which the word limit is higher.) The abstract must be self-contained and clear without reference to the text and should be written for a general journal readership. The abstract format should include four sections: “Objective” (the purpose or hypothesis of study), “Research Design and Methods” (the basic design, setting, number of participants and selection criteria, treatment or intervention, and methods of assessment), “Results” (significant data found), and “Conclusions” (the validity, limitations, and clinical applicability of the study and its results).

The Conclusions section should discuss the findings of the study in the context of past research concerning the topic of the article, in particular highlighting how these findings add new information. Also, this section should, where possible, assess the possible clinical relevance of the findings avoiding any claim or terminology of superiority, especially when statistically significant but quantitatively modest differences are found.

The word count limit for Original Articles is 4,000 words, excluding words in tables, table legends, figure legends, title page, acknowledgments, and references. In addition, an original article is limited to a combination of 4 tables and figures. References are limited to 40 citations.

A conflict-of-interest statement for all authors must be included in the Acknowledgments section of the main document, which should follow the main text and precede the references. If there are no relevant conflicts of interest to disclose, authors should indicate as such in the Acknowledgments section.

In the case of multicenter studies, authors should provide a list of participating investigators in an appendix to the paper. Papers will not be reviewed if this information is not included.

Where appropriate, clinical and epidemiological studies should be analyzed to see if there is an effect of sex or ethnicity. If there is no effect, it should be stated as such in the “Results” section.

Randomized Clinical Trial reporting: Authors of reports on randomized controlled trials are required to use the instructions and checklist in the Consolidated Standards of Reporting Trials (CONSORT) Statement. The instructions and checklist are designed to ensure that information pertinent to the trial is included in the study report. CONSORT information may be included in a supplemental online-only file so that it does not affect word count limitations.

All clinical trials submitted to Diabetes Care for consideration of publication must be registered with a clinical trial registry approved by the International Committee of Medical Journal Editors (ICMJE). Please see Section 2.5 for more information.

5.2. Novel Communications in Diabetes. Novel Communications in Diabetes are designed to provide new and exciting findings in clinical research or clinical care in one or more of the following areas:

  • the feasibility of a "proof of concept" principle or idea
  • a novel or innovative finding considered as a pilot study when planning for a larger trial
  • results from early phase human investigation from a small number of subjects including “first in man” studies
  • new technical advances (i.e., early research on artificial pancreas, glucose monitoring) or advances in diagnostic testing
  • studies defining a novel molecular target
  • studies that challenge current thinking for clinical management or novel approach to behavioral management
  • case report/case studies that represent a unique or novel finding on disease presentation or treatment effects

Novel Communications are not intended to be short reports on studies that are not powered for larger trials or to simply confirm findings from other studies.

A structured abstract of no more than 150 words is required. The abstract must be self-contained and concise, without reference citations, and written for a general journal readership. The abstract should be followed by a short introduction (two to three sentences) and four concise sections: Research Design and Methods, Results, Conclusions, and References. References are limited to no more than 15. In addition, Novel Communications may contain only one table or one figure.

The format of the title page, margins, text, table, figure, and font size for Novel Communications is the same as for Original Articles. Manuscripts should be double spaced, written in Arial or Times New Roman 12 point font, and saved as a .doc, .txt, or .rtf file. See Sections 6.2 and 6.3 of Manuscript Format and Style.

The word count limit for Novel Communications is 1,350 words, including the 150 word abstract. Tables, figures, legends, the title page, acknowledgments, and references are not included in the word count.

Novel Communications in Diabetes are freely accessible to readers upon publishing.

5.3. Letters. All Letters are published only in the online version of Diabetes Care. Letters are listed in the table of contents of the print version and are assigned an "E" page number. Each letter is assigned a unique DOI (digital object identifier); when citing a letter, include the DOI  (e.g., 10.2337/dcXX-XXXX).

Letters do not have abstracts, should not exceed 500 words (excluding a maximum of 5 references). As with all submissions, letters should be double-spaced and include a title page.

Diabetes Care accepts three types of letters:

Comment Letters comment on a recently published article and should include the cited paper as reference 1 in the reference list. It should be submitted within 3 months of the article’s printed publication. Comment letters do not have tables or figures.

Response Letters are an invited letter from the cited author that replies to the comment letter and should include the comment letter as reference 1 in the reference list. Response letters do not have tables or figures.

Observation Letters comment on a relevant finding related to clinical care or research or present a case report/case study. Observation letters are allowed either one table or one figure.

All letters require a signed Manuscript Submission Form from the author(s). A conflict-of-interest statement for all authors must be included in the Acknowledgments section of the main document. If there are no relevant conflicts of interest to disclose, authors should indicate as such in the Acknowledgments section.

All letters are freely accessible to readers upon publishing.

5.4. Commentaries. Diabetes Care publishes Commentaries by invitation only. Commentaries normally accompany an original article and are invited by the editors. Instructions will be provided at the time of solicitation.  As with any submission, commentaries should include a title page and be double-spaced. A commentary is limited to 1,200 words and 25 references, and it should not include an abstract.

All commentaries require a signed Manuscript Submission Form from the author(s). A conflict-of-interest statement for all authors must be included in the Acknowledgments section of the main document. If there are no relevant conflicts of interest to disclose, authors should indicate as such in the Acknowledgments section.

5.5. Review Articles and Meta-analyses. Please read the criteria and formatting guidelines for meta-analyses and systematic review articles. While a meta-analysis may be submitted to the journal without prior approval from the editors, review articles are only published in Diabetes Care if they have been invited or approved by the editors prior to submission. If you would like to submit an uninvited review article, you must first submit a proposal to the editors.

The proposal should include: 1) a detailed outline of the content of the proposed review; 2) a general idea of the amount of original literature to be summarized; and 3) the background of the author(s) and a description of expertise in the area to be discussed in the review. It is anticipated that the author(s) will have worked and published in the area covered by the review. The author should also state why he/she feels this particular review is suited for Diabetes Care and why the review would appeal to the readership.

Lastly, the authors must disclose whether they propose to write the entire article themselves, whether they received any form of sponsorship or honorarium for the material, and whether a pharmaceutical company, or its representative, was involved in the funding or authorship. In addition, the authors must point out any potential conflict of interest with a company whose products will be discussed in the review.

All proposals should be submitted by e-mail (as Word document attachments) to Lyn Reynolds in the Editorial Office (lreynolds{at}diabetes.org). Review Articles submitted without prior approval or invitation will be returned. All Review Articles (whether invited or by query) are subject to peer review.

Once approved, Review Articles are limited to 5,000 words, 60 references, and an unstructured 250-word abstract.

5.6. Editorials. Editorials are accepted by invitation only from the Editorial Committee. As with all submissions, an editorial must include a title page and authors must provide a signed Manuscript Submission Form. The word limit for an Editorial is 1,500 words, not including references. Editorials normally do not contain figures or tables. A conflict-of-interest statement for all authors should be included at the end of the text or the Acknowledgments section, if one is included. Please label this section “Disclosure.” If the authors have no relevant conflict of interest to disclose, please indicate so in this section.

5.7. Perspectives. Perspectives highlight recent exciting research, not primarily that of the author(s), and may provide context for the findings within a field or explain potential interdisciplinary significance (similar to that of a Review Article). Invited Perspectives commenting on articles in Diabetes Care should add a dimension to the research and not merely be a summary of the experiments presented in the article. It can also be a critical review, which is more interpretational than a summary, and if justified by a strong rationale it can propose a novel hypothesis.

The format of a Perspective is similar to that of an Original Article. Perspectives may have a short unstructured abstract, which is recommended for Medline indexing.

The Word limit is 4,000 words (excluding the title page, acknowledgments, references, tables and figures, and table/figure legends). The main text should be double-spaced with 1” justified margins.

References are limited to no more than 50 and should be single spaced. References should not be included as endnotes but should be independent (that is, if the reference number in the text was to be deleted, the reference would not automatically disappear from the reference list).

The article can contain no more than a combination of 8 tables and/or figures. Tables must be included in the text after the reference list. Please use the “insert table” command in Word to create tables. (Do not use the tab or return key to create the table.) Each piece of data should appear in its own cell. Table titles and legends need to be above or below the table, not inside the table. Figures should be uploaded separately and in their original file format (that is, from the program they were created in and saved in the same format. Example: If a figure was created in Powerpoint, it must be saved as a .ppt file; if a figure was created in Adobe Illustrator, it must be saved as an .ai file).

If necessary, supporting documents/data not for publication can be uploaded to the submission site for review purposes. (When uploading, be sure each file is clearly labeled "supporting document/data.")

During the submission process, a box is provided for you to type a short note to the Editorial Office or Editor. If this is an invited article, please indicate it here. As with all submissions, invited articles are sent out for peer review, and the final decision is dependent on the comments of the reviewers.

5.8. Supplements. Supplements must be approved prior to submission. A proposal for a supplement should first be submitted to the Publications Department of the ADA (ckohler{at}diabetes.org) and must specify the following:

  • The name of the organization(s) sponsoring and funding the supplement (not merely the name of the public relations agency handling its publication).
  • If the supplement is based on a symposium, where and when the symposium was held and how the speakers and papers were selected.
  • Whether authors will be paid and, if so, how much.

If the proposal is approved, it will be forwarded to the Editor of Diabetes Care. Initial approval by the ADA does not commit the Editor to accept a proposal in whole or part. All manuscripts are subject to the same peer review as other manuscripts in the journal.

For complete instructions on submitting a supplement, please contact the diabetescare{at}diabetes.org.

6. MANUSCRIPT FORMAT AND STYLE

Articles must be in clear and understandable English. Non-native English authors are encouraged to seek the assistance of an English-proficient colleague, or a communications agency, such as American Journal Experts, to help improve the clarity and readability of a paper before it is submitted to the journal.

For specific information on the parameters and limits for various manuscript categories (e.g., section headings, word limits, etc.), see section 5, Manuscript Categories.

6.1. Title Page. Every manuscript, regardless of article type, must have an accompanying title page. In addition to the title, the title page should include a short running title (less than 47 characters and spaces combined); the first name, middle initial, last name, and highest academic degree of each author; affiliation (in English) of each author during the time the study was conducted; name, current address, telephone number, fax number, and e-mail address of the corresponding author; and the word count and number of tables and figures.

6.2. Main Document. The main document file includes the title page, abstract, main text, acknowledgements, figure legends, references, and tables. Please do not use headers, footers, or endnotes in your paper.

The Main Document should be in Word document format (not as a PDF). This will allow our Editorial Office to verify the word count and our production staff to turn your paper (if accepted) into an article.

6.3. Text Composition. Articles should be written in clear, concise English following the recommendations for scientific writing found in Scientific Style and Format, the Council of Science Editors (CSE) style manual (7th ed., 2006, Reston, VA, Council of Science Editors). All accepted manuscripts will be edited according to the CSE style manual and The Chicago Manual of Style (16th ed., 2010, Chicago, IL, The University of Chicago Press) by ADA professional publications staff. The authors are responsible for all statements made in their articles or editorials, including any editing changes made by staff. Proof pages will be sent to the corresponding author and should be read carefully.

The designations type 1 diabetes and type 2 diabetes should be used when referring to the two major forms of diabetes. Abbreviations for diabetes, such as T2D for type 2 diabetes, should not be used. The term diabetic should not be used as a noun.

All manuscripts should be double-spaced, in Arial or Times New Roman 12-point font, and saved as a .doc, .txt, or .rtf file. In addition, please do not "lock" or "page protect" your document, and avoid using footnote and endnote functions.

6.4. Abbreviations and Units. Abbreviations should be used only when necessary, e.g., for long chemical names (HEPES), procedures (ELISA), or terms used throughout the article. See the list of abbreviations that need not be defined; all others must be defined at first use. Abbreviate units of measure only when used with numbers. Abbreviations may be used in tables and figures. The CSE style manual contains lists of standard scientific abbreviations.

Clinical laboratory values and units should be in Système International (SI) form. Kilocalories should be used rather than kilojoules. 

HbA1c values should be dually reported as “% (mmol/mol).” Please use the NGSP’s HbA1c converter at http://www.ngsp.org/convert1.asp to calculate HbA1c values as both % and mmol/mol.

6.5. Font. Text, including title and author names, should be in 12-point Arial or Times New Roman. Please avoid using boldface font. Text in tables should be no smaller than 10-point font.

6.6. Margins. Margins should be 1" at the top and bottom and 1" on the left and right sides.

6.7. Acknowledgments. The acknowledgments are located after the main text and before the reference list. Acknowledgments should contain the author contributions paragraph, brief statements of assistance, the guarantor's name (person[s] taking responsibility for the contents of the article), funding/financial support, and reference to prior publication of the study in abstract form, where applicable.

6.8. References. The reference list should go at the end of the document, after the main text and acknowledgments (if applicable) and before the tables. Original Articles are limited to 40 references. Letters are allowed 5 references. Review Articles are allowed 60 references, and meta-analyses should have no more than 40 references.

Reference numbers in the text should appear in chronological order in normal type and in parentheses [e.g., “In the study by Norton et al. (23)...”]. Please do not use the footnote or endnote function to cite studies or create a reference list. A reference manager must have the ability to customize the display of references. For example, the reference application should have the option to list the references at the end of the paper, as opposed to listing the references as endnotes or footnotes at the bottom of each page, and should not embed the list in the text as a series of endnotes/footnotes. When using a reference manager (e.g., Thomson's EndNote Reference Program), don't forget to generate the list as a bibliography in a style suitable to Diabetes Care, and then save and submit as the final step to creating the references. Otherwise, references should be manually inserted.

All authors must be listed by first initials and last name in each reference, and please provide inclusive page numbers. Journal titles should be abbreviated according to the National Library of Medicine’s List of Journals Indexed for Medline; for unlisted journals, please provide complete journal titles. Material in press may be cited, but copies of such material may be requested. Authors are responsible for the accuracy of the references. Click here for examples of how references should be formatted.

6.9. Supplemental Data. Non-essential tables, figures, and/or videos may accompany articles as online-only supplemental files, but authors are asked to include a comment to the editor at the time of manuscript submission that explains the rationale and justification for submitting and possibly posting the supplemental materials.

All online-only supplementary files should be combined in one document file whenever possible and uploaded during the submission process. The file must be clearly labeled as Online-Only Supplemental Material” (tables, figures, etc.) or "Online Supplemental Video." In addition, supplemental online-only files mustbe referenced in the main text of the manuscript at least once (e.g., “Supplemental Table S1”).

All online-only supplemental files are subject to review, but such files will not  be copyedited or proofread by ADA production staff. As such, authors are encouraged to review their supplemental files carefully before submitting them.

Lists that include names of principal investigators or writing groups may also be submitted as online-only supplements if they exceed 150 words. Otherwise, the names of principal investigators or writing groups should be listed in an appendix at the end of the main document, before the references.

6.10. Tables. Each table should be inserted on a separate page at the end of the document with the table number, title, and legend indicated. Table legends should be inserted below the table and should not be included inside the table. Tables should be created using Word and the "Insert Table" command. Please use Arial or Times New Roman font, no smaller than 10-point. Tables with internal divisions are not allowed (Tables 1A and B) and should be submitted as individual tables (Tables 1 and 2). Please avoid using shading within a table. If a table includes data that require explanation in the legend, apply the following sequence of symbols, from top to bottom, left to right: *, †, ‡, §, ||, ¶, #, **, ††, ‡‡.

6.11. Figures. Diabetes Care uses digital publishing methods throughout the journal production process. If your article is accepted, it will be published in both the print and online journal. The following sections provide information on how to format your figures to ensure the best possible reproduction of your images.

Size. Figures should be produced at the size they are to appear in the printed journal. Please make sure your figures will fit in one, two, or three columns in width. Multi-paneled figures should be assembled in a layout that leaves the least amount of blank space.

1 column = 13 picas wide, 2.2 in, 5.6 cm
2 columns = 28 picas wide, 4.6 in, 11.7 cm
3 columns = 41 picas, 6.8 in, 17.3 cm

Font. At 100% size, fonts should be 8-10 points and used consistently throughout all figures.

Text. Information on the axes should be succinct, using abbreviations where possible, and the label on the y-axis should read vertically, not horizontally. Key information should be placed in any available white space within the figure; if space is not available, the information should be placed in the legend. In general, figures with multiple parts should be marked A, B, C, etc., with a description of each panel included in the legend rather than on the figure.

Line and bar graphs. Lines in graphs should be bold enough to be easily read after reduction, as should all symbols used in the figure. Data points are best marked with the following symbols, again assuring that they will be readily distinguishable after reduction: . In the figure legend, please use words rather than the symbols; e.g., "black circles = group 1; white squares = group 2; black bars = blood glucose; white bars = C-peptide." Bars should be black or white only, unless more than two datasets are being presented; additional bars should be drawn with clear bold hatch marks or stripes, not shades of gray.

Line or bar graphs or flow charts with text should be created in black and white, not shades of gray, which are difficult to reproduce in even tones.

Formatting digital figures files for print and online reproduction. To meet ADA’s quality standards for publication, it is important to submit digital art that conforms to the appropriate resolution, size, color mode, and file format. Doing so will help to avoid delays in publication and maximize the quality of images, both online and in print. Please refer to ADA's Digital Art Guidelines when preparing your files. If you are unable to provide files that meet the specifications outlined in the Guidelines, you may submit your original source files (files from the program in which they were originally created).

Reproductions. If materials (e.g., figures and/or tables) are taken from other sources, the author must provide written permission for reproduction from the original publisher and author at the time of submission. In addition, the source should be cited at the end of the figure legend. For more information, refer to Permissions: Help for Authors.

Digital image manipulation. The American Diabetes Association has adopted the statement developed by the Journal of Cell Biology as its policy on the manipulation of digital images:

"No specific feature within an image may be enhanced, obscured, moved, removed, or introduced. The grouping of images from different parts of the same gel, or from different gels, fields, or exposures must be made explicit by the arrangement of the figure (i.e., using dividing lines) and in the text of the figure legend. Adjustments of brightness, contrast, or color balance are acceptable if they are applied to the whole image and as long as they do not obscure, eliminate, or misrepresent any information present in the original, including backgrounds. Without any background information, it is not possible to see exactly how much of the original gel is actually shown. Non-linear adjustments (e.g., changes to gamma settings) must be disclosed in the figure legend."

All digital images in manuscripts accepted for publication will be scanned using image forensics software for any indication of improper manipulation. Cases of questionable or inappropriate image alterations will be referred to the Association’s Subcommittee on Ethical Scientific Publications (ESP). The ESP may request the original data from the authors for comparison to the prepared figures. If the authors fail to provide the original data, the acceptance of the manuscript will be revoked. Cases of deliberate misrepresentation of data will result in revocation of acceptance, and will be reported to the corresponding author's home institution and/or funding agency as appropriate.

For examples of what constitutes improper digital manipulation (as well as other forms of scientific misconduct), ADA encourages authors to refer to the 2006 editorial by the Journal of Clinical Investigation titled “Stop Misbehaving!” In addition, authors are encouraged to refer to Adobe’s white paper on using Photoshop CS3 Extended in biomedical imaging. The paper provides useful information on maintaining image integrity, editing nondestructively, and the medical and scientific image workflow.

6.12. Video. Videos can now be published in the online article, with a still image from the video appearing in the PDF and the print version. Still images are encouraged, but not required, and should represent as best as possible the main subject of the video. Video files should be clearly labeled as "video 1," "video 2," etc., and still images should be named "video 1 still image," etc. Each video must be cited in the text, and a legend must accompany each video. Video legends should include labels that correspond with the in-text citation and should be placed after the figure legends in the manuscript.

Videos can also be submitted as supplementary data and should be labeled "online supplemental video 1," etc. Supplementary videos are not required to have legends. 

Most video formats are acceptable, including .avi, .flv, .mov, .mp4, .swf, .wav, .wma, .wmv, and more. For helpful information about creating videos, please visit the Video Creation Guide.

7. SUBMITTING A MANUSCRIPT

Please read the complete instructions for authors before submitting your manuscript to Diabetes Care via http://mc.manuscriptcentral.com/diabetescare.

Your manuscript should be submitted under the user account of the designated corresponding author (the contact person listed on the title page of the manuscript). If the corresponding author does not have a user account, please follow the instructions on the submission site.

In the File Upload Center, you will be able to browse your computer for the files associated with your manuscript. When you upload each file, be sure to choose a designation from a pull-down menu that describes the file content (e.g., “Main Document,” “Figure,” “Table,” etc.). In addition, please make sure each file name clearly describes its content (e.g., “figure1.jpg,” “table2.doc,” “coverletter.doc,” etc.).

The system automatically converts files to PDF files. Please do not upload PDF files except for signed Manuscript Submission Forms. Also, please do not upload zip or PowerPoint files.

Instructions for submitting a revised manuscript are included in the initial decision letter. Revisions must meet all formatting requirements and word limits; no exceptions will be made. In addition, all signed manuscript forms must be faxed to the Editorial Office by the time the revision is submitted. If complete forms have not been received, it is likely that the revision will be unsubmitted. Receipt of forms may be verified by contacting Joan Garrett (jgarrett{at}diabetes.org).

When submitting a revision, click “create a revision” in your “Author Center” on http://mc.manuscriptcentral.com/diabetescare.This will allow the paper to be submitted using the same manuscript number as the original submission. When revising your manuscript, please show corrections by using track changes. Be sure to respond to all reviewer comments on the original submission.

Please include the latest set of files with your revision(s), including the most recent set of all table and figure files.
Once your text and image files are uploaded, please view these files to ensure they appear legibly and that all special characters have translated properly. Do not click "Submit Manuscript" until you are satisfied with the quality of the proofs. If you are having trouble uploading files, please contact the editorialoffice{at}diabetes.org for guidance.

8. ACCEPTED MANUSCRIPTS

To make new research readily available to subscribers, Diabetes Care publishes original research articles online ahead of print. For detailed information on publish-ahead-of-print articles, see Section 2.2 of Policies.

The designated corresponding author will receive notification of availability of page proofs by e-mail. Corrections should be returned to the Editorial Manager (see contact info below) by fax or e-mail within 24 hours of receipt of the proof. Failure to do so may delay the publication of the article.

Correspondence concerning the copyediting and proofreading of accepted manuscripts should be addressed to Valentina Such, Editorial Manager, Diabetes Care, American Diabetes Association, 1701 North Beauregard St., Alexandria, VA 22311; tel: 703-299-2083; fax: 703-253-4870; e-mail: vsuch{at}diabetes.org.

Correspondence concerning the production of accepted articles and availability of page proofs should be addressed to Amy Gavin, Production Manager, American Diabetes Association, 1701 North Beauregard St., Alexandria, VA 22311; tel: 703-299-2033; fax 703-253-4870; e-mail: %20agavin{at}diabetes.org.

9. FINANCIAL OBLIGATIONS

Page charges are assessed for non-invited articles to help defray the costs of publication. The charge is $90 per page. In addition, each color figure printed will incur a charge of $475. Color fees are based on individual figures as a whole, not by the part, i.e., A, B, C, etc. Authors will receive an invoice for publication fees, as well as a reprint order form, when page proofs become available. Unless otherwise indicated, it is assumed that the corresponding author takes responsibility for payment.