1. Department of Endocrinology and Metabolism; Peking University People's Hospital; Beijing China
2. The George Institute for Global Health at Peking University Health Science Center; Beijing China
3. Department of Endocrinology, Chinese PLA General Hospital; Beijing China
4. Department of Endocrinology, Peking University First Hospital; Beijing China
5. Department of Endocrinology and Metabolism, Shanghai Sixth Hospital; Shanghai China
6. Department of Endocrinology, The Third Affiliated Hospital of Sun Yat-sen University; Guangzhou China
7. Department of Endocrinology, China-Japan Friendship Hospital; Beijing China
8. Department of Endocrinology, The Second Military Medical University; Shanghai China
9. Department of Endocrinology and Metabolism, Xiangya Second Hospital; Changsha China
10. Barbara Davis Center for Diabetes; University of Colorado Denver; Denver Colorado