1. China CDC Key Laboratory of Environment and Human Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
2. Chaoyang District Center for Disease Control and Prevention, Beijing 100021, China
3. School of Public Health, Peking University, Beijing 100191, China
4. Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu 211166, China