DOI: 10.2337/dc07-1397 © 2007 by the American Diabetes Association
High Titer of Autoantibodies to GAD Identifies a Specific Phenotype of Adult-Onset Autoimmune DiabetesResponse to Kobayashi et al.
1 Department of Clinical Sciences, "La Sapienza" University, Rome, Italy Address correspondence to Raffaella Buzzetti, MD, Department of Clinical Sciences, "La Sapienza" University, Rome, Italy. E-mail: raffaella.buzzetti@uniroma1.it
In our article (1) on adult-onset autoimmune diabetes, titers of antibodies to GAD (GADA) are reported in arbitrary units, i.e., they are elaborated in-house; therefore, they are unsuitable for comparison with other studies. However, as anticipated by Kobayashi et al. (2), the participation in the Diabetes Antibody Standardization Program (3) allows us to convert these measurements into World Health Organization (WHO) units. The value of 32 units,
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