1. Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin 300070, China
2. Project Office, Tianjin Women and Children’s Health Center, Tianjin 300070, China
3. Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin 300070, China
4. Tianjin Center for International Collaborative Research on Environment, Nutrition and Public Health, Tianjin 300070, China
5. Population Cancer Research Program and Department of Pediatrics, Dalhousie University, 15000, Halifax, Canada
6. Chronic Disease Epidemiology Laboratory, Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
7. Department of Toxicology and Sanitary Chemistry, School of Public Health, Tianjin Medical University, Tianjin 300070, China