1. Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
2. Institute of Reproductive and Child Health, Peking University/Key Laboratory of Reproductive Health, National Health Commission of the People's Republic of China, Beijing 100191, China
3. Department of Epidemiology, School of Public Health and Management, Binzhou Medical University, Yantai 264003, China
4. State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers, Beijing Key Laboratory of Carcinogenesis and Translational Research, Department of Cancer Epidemiology, Peking University Cancer Hospital & Institute, Beijing 100142, China
5. Department of Toxicology, School of Public Health, Peking University, Beijing 100191, China
6. Key Laboratory of Epidemiology of Major Diseases (Peking University), Ministry of Education, Beijing 100191, China
7. College of Urban and Environmental Sciences, Peking University, Beijing 100871, China