1. Division of Endocrinology, Department of Internal Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia
2. Division of Endocrinology, Diabetes and Metabolism, The Johns Hopkins University, Baltimore, MD, USA
3. Strategic Center for Diabetes Research, College of Medicine, King Saud University, Riyadh, Saudi Arabia
4. Department of Internal Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia
5. Division of Endocrinology, Department of Pediatrics, College of Medicine, King Saud University, Riyadh, Saudi Arabia
6. Obesity Research Center, College of Medicine, King Saud University, Riyadh, Saudi Arabia