Letter to the Editor From Chang Villacreses et al: "Effects of Vitamin D Supplementation on Insulin Sensitivity and Secretion in Prediabetes"

Affiliations

• ¹ Department of Clinical Diabetes, Endocrinology, and Metabolism, City of Hope National Medical Center, Duarte, California 91010, USA.
• ² Division of Endocrinology, Department of Medicine, University of Kansas Medical Center, Kansas City, Kansas 66160, USA.
• ³ Department of Internal Medicine, Bassett Medical Center, Cooperstown, New York 13326, USA.
• ⁴ Department of Internal Medicine, National Cheng Kung University Hospital, National Cheng Kung University, Tainan 700, Taiwan.
• ⁵ Division of Endocrinology, Department of Internal Medicine, Harbor-UCLA Medical Center, Torrance, California 90509, USA.
• ⁶ Metabolic Diseases and Endocrinology, The Lundquist Institute, Torrance, California 90509, USA.