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Original Research:
Guixiang Zhao,
Earl S. Ford,
and Chaoyang Li
Associations of Serum Concentrations of 25-Hydroxyvitamin D and Parathyroid Hormone with Surrogate Markers of Insulin Resistance
among U.S. Adults without Physician-Diagnosed Diabetes: National Health and Nutrition Examination Survey, 2003-2006 Diabetes Care ; published ahead of print October 21, 2009, doi:10.2337/dc09-0924