1. Department of Toxicology and Hygienic Chemistry, School of Public Health, Capital Medical University, Beijing, China
2. Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China
3. Department of Laboratory Animal, Capital Medical University, Beijing, China
4. Central Laboratory, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Chaoyang, Beijing, China
5. School of Nursing, Peking University, Beijing, China