1. Guizhou Provincial Center for Disease Control and Prevention, Guiyang, Guizhou, China
2. School of Public Health and Health, the key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, Guizhou, China
3. Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, China
4. Tianjin Shenlan Public Health Counselling Service Center, Tianjin, China
5. Key Laboratory of Epidemiology of Major Diseases, Ministry of Education, Peking University, Beijing, China
6. Global Center for Infectious Disease and Policy Research & Global Health and Infectious Diseases Group, Peking University, Beijing, China