1. Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, PR China
2. Peking University Sixth Hospital, Peking University Institute of Mental Health, National Clinical Research Center for Mental Disorders, Beijing, PR China
3. Zigong Fifth People’s Hospital, Zigong, PR China
4. The Third Hospital of Mianyang, Sichuan Mental Health Center, Mianyang, PR China
5. Xiamen City Xianyue Hospital, Xiamen, PR China
6. Taiyuan Psychiatric Hospital, Shanxi Mental Health Center, Taiyuan, PR China
7. Beijing Fangshan District Psychiatric Hospital, Beijing, PR China
8. Zigong Yantan District Mental Health Center, Zigong, PR China
9. Psychiatric Hospital of Jiangyou, Jiangyou, PR China