1. Department of Toxicology and Sanitary Chemistry, School of Public Health, Tianjin Medical University, Tianjin, PR China
2. Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin Medical University, Tianjin, PR China
3. Center for International Collaborative Research on Environment, Nutrition and Public Health, School of Public Health, Tianjin Medical University, Tianjin, PR China
4. Tianjin Central Obstetrics and Gynecology Hospital, Tianjin, PR China