1. Diabetes Center (Y.Z., L.Y., Y.X., L.L., G.H., Z.L., X.L., Z.Z.), Institute of Metabolism and Endocrinology, The Second Xiangya Hospital and Key Laboratory of Diabetes Immunology, Ministry of Education, Central South University, Changsha, Hunan 410011,
2. People's Republic of China; Department of Diabetes and Metabolic Medicine (R.D.L.), Blizard Institute, London E1 2AT, United Kingdom;
3. Division of Endocrinology, Metabolism, and Nutrition (X.W.), Rutgers University-Robert Wood Johnson Medical School, New Brunswick, New Jersey 08903