1. Division of Endocrinology; Metabolism, and Diabetes, First Department of Pediatrics, University of Athens Medical School, “Aghia Sophia” Children's Hospital; Athens Greece
2. Division of Endocrinology and Metabolism; Clinical Research Center, Biomedical Research Foundation of the Academy of Athens; Athens Greece
3. Saudi Diabetes Study Research Group; King Fahd Medical Research Center; King Abdulaziz University; Jeddah Saudi Arabia
4. Program in Reproductive and Adult Endocrinology; Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health; Bethesda Maryland