1. Department of Endocrinology, Jiangyin People's Hospital, School of Medicine, Southeast University, Jiangyin, Jiangsu 214400, P.R. China
2. State Key Laboratory of Reproductive Medicine, Institute of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
3. Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210036, P.R. China
4. Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
5. Department of Science and Education Section, Maternity and Child Care Hospital of Nanjing, Nanjing, Jiangsu 210004, P.R. China