1. Ministry of Education – Shanghai Key Laboratory of Children’s Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
2. Hainan Women and Children’s Medical Center, Hainan, China
3. Department of Obstetrics, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
4. Shanghai Jiao Tong University School of Public Health, Shanghai, China