1. National Center for Chronic and Non-communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
2. Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
3. Division of Elderly Health, National Center for Chronic and Noncommunicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
4. Department of Endocrinology, Key Laboratory of Endocrinology, National Commission of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
5. Medical Sciences Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
6. Department of Wound Repair and Rehabilitation Medicine, State Key Laboratory of Trauma, Burns and Combined Injury, Daping Hospital, Army Medical University, Chongqing, China
7. Department of Orthopaedics, Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, China
8. Department of Endocrinology, Chengdu Military General Hospital, Chengdu, Sichuan Province, China
9. Beijing Center for Diseases Prevention and Control, Beijing, China
10. Shanxi Provincial Center for Disease Control and Prevention, Taiyuan, Shanxi Province, China
11. Jilin Provincial Center for Disease Control and Prevention, Changchun, Jilin Province, China
12. Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, Jiangsu Province, China
13. Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang Province, China
14. Hubei Provincial Center for Disease Control and Prevention, Wuhan, Hubei Province, China
15. Hunan Provincial Center for Disease Control and Prevention, Changsha, Hunan Province, China
16. Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, Guangdong Province, China
17. Sichuan Center for Disease Control and Prevention, Chengdu, Sichuan Province, China
18. Chongqing Center for Disease Control and Prevention, Chongqing, China
19. Shaanxi Provincial Center for Disease Control and Prevention, Xi'an, Shaanxi Province, China
20. Hunan Provincial Key Laboratory of Metabolic Bone Diseases, National Clinical Research Center for Metabolic Diseases, Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha, Hunan Province, China
21. Department of Integrated Traditional Chinese and Western Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
22. Department of Endocrinology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangdong Provincial Geriatrics Institute, Guangzhou, Guangdong Province, China
23. Department of Osteoporosis, Jilin FAW General Hospital, Changchun, Jilin Province, China
24. Center of Osteoporosis, Zhejiang Provincial People's Hospital, Hangzhou, Zhejiang Province, China
25. Department of Osteoporosis, Honghui Hospital, Xi’an Jiaotong University, Xi’an, Shaanxi Province, China
26. Department of Endocrinology, The First Affiliated Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
27. San Francisco Coordinating Center, California Pacific Medical Center Research Institute, San Francisco, California