1. Research Center for Public Health and Social Security, School of Public Administration, Hunan University, Changsha, China
2. Department of Social Medicine and Health Management, Xiangya School of Public Health, Central South University, Changsha, China
3. Division of Prevention and Community Research and The Consultation Center, Department of Psychiatry, Yale School of Medicine, New Haven, CT, USA
4. Zibo Central Hospital, Zibo, China
5. Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA