1. Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Centre, Beijing 100191, China
2. International Research Center of Medicinal Administration, Peking University, Beijing 100191, China
3. Department of Preventive Medicine, College of Medicine, Shihezi University, Shihezi 832002, China
4. Department of Orthopedics, Tianjin Fifth Central Hospital, Tianjin 300450, China
5. Department of Endocrinology and Metabolism, People’s Hospital, Peking University, Beijing 100044, China