1. Department of Epidemiology and Health Statistics, School of Public Health and Family Medicine, Capital Medical University, Beijing Key Laboratory of Epidemiology, Beijing, China; Center of Public Health Surveillance and Information Service, Chinese Center for Disease Control and Prevention, Beijing, China
2. Department of Epidemiology and Health Statistics, School of Public Health and Family Medicine, Capital Medical University, Beijing Key Laboratory of Epidemiology, Beijing, China
3. Department of Health Law, School of Health Administration and Education, Capital Medical University, Beijing, China