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. Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, China
3. Jinan Center for Disease Control and Prevention, Jinan 250021, Shandong, China
4. Shandong Center for Disease Control and Prevention, Jinan 250014, Shandong, China