1. Institute of Reproductive and Child Health, Ministry of Health Key Laboratory of Reproductive Health, Peking University Health Science Center, Beijing, China2Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China3Office for National Maternal and Child Health Statistics of China, School of Public Health, Peking University Health Science Center, Beijing, China
2. Office for National Maternal and Child Health Statistics of China, School of Public Health, Peking University Health Science Center, Beijing, China4Department of Child, Adolescent, and Women’s Health, School of Public Health, Peking University Health Science Center, Beijing, China
3. Department of Pediatrics, New York University School of Medicine, New York6Department of Environmental Medicine, New York University School of Medicine, New York7Department of Population Health, New York University School of Medicine, New York8Wagner School of Public Service, New York University, New York
4. Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
5. Wagner School of Public Service, New York University, New York
6. Department of Population Health, New York University School of Medicine, New York8Wagner School of Public Service, New York University, New York