1. 1Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China
2. 2Key Laboratory of Molecular Cardiovascular Sciences (Peking University), Ministry of Education, Beijing, China
3. 3Peking University Institute of Environmental Medicine, Beijing, China
4. 4Chinese Academy of Medical Sciences, Beijing, China
5. 5Medical Research Council Population Health Research Unit at the University of Oxford, Oxford, UK
6. 6Clinical Trial Service Unit & Epidemiological Studies Unit (CTSU), Nuffield Department of Population Health, University of Oxford, Oxford, UK
7. 7Zhouquan Town Health Center, Tongxiang, Zhejiang, China
8. 8Gaoqiao Town Health Center, Tongxiang, Zhejiang, China
9. 9China National Center for Food Safety Risk Assessment, Beijing, China