1. Department of Postgraduate Students, West China Hospital and West China School of Medicine, Sichuan University, Chengdu, China
2. Department of Epidemiology and Biostatistics, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, China
3. Department of Environmental Health and Occupational Medicine, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, China
4. Sichuan Provincial Center for Mental Health, Sichuan Academy of Medical Sciences & Sichuan Provincial People’s Hospital, Chengdu, China
5. Department of Periodical Press and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
6. Chinese Evidence-Based Medicine Center, West China Hospital, Sichuan University, Chengdu, China