1. Sun Yat-sen University School of Sociology and Anthropology, , Guangzhou, P.R. China
2. Law School of Chengdu University , Chengdu, P.R. China
3. Sun Yat-sen University Department of Medical Statistics & Epidemiology, School of Public Health, , Guangzhou, P.R. China
4. Sun Yat-sen University Sun Yat-sen Global Health Institute, School of Public Health and Institute of State Governance, , Guangzhou, P.R. China