1. Department of Endocrinology and Metabolism; Chinese PLA General Hospital; Beijing China
2. China-Japan Friendship Hospital; Beijing China
3. Sun Yat-sen University Third Hospital; Guangzhou China
4. Shanghai Jiao Tong University Affiliated Sixth People's Hospital; Shanghai China
5. Peking University People's Hospital; Beijing China
6. First Affiliated Hospital; Chinese Medical University; Shenyang Liaoning China
7. Shanxi Province People's Hospital; Taiyuan Shanxi China
8. West China Hospital, Sichuan University; Chengdu Sichuan China
9. Xijing Hospital; Fourth Military Medical University; Xi'an Shaanxi China
10. The Affiliated Drum Tower Hospital of Nanjing University Medical School; Nanjing Jiangsu China
11. Xinjiang Uygur Autonomous Region's Hospital; Urmqi Xinjiang China
12. Fujian Provincial Hospital; Fuzhou Fujiang China
13. Qilu Hospital of Shandong University; Jinan Shandong China
14. Peking University First Hospital; Beijing China
15. Henan Province People's Hospital; Zhengzhou Henan China
16. Second Affiliated Hospital of Harbin Medical University; Harbin Heilongjiang China
17. Xiangya Second Hospital; Changsha Hunan China
18. Department of Epidemiology and Statistics; Institute of Basic Medical Sciences; Chinese Academy of Medical Sciences; School of Basic Medicine; Peking Union Medical College; Beijing China