1. Key Laboratory of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University , Shanghai, China
2. Key Laboratory of Public Health Safety, Ministry of Education, School of Public Health, Fudan University , Shanghai, China
3. Division of Epidemiology, Department of Medicine, Vanderbilt-Ingram Cancer Center, Vanderbilt Epidemiology Center, Vanderbilt University Medical Center , Nashville, TN, USA
4. Department of Medicine, School of Medicine, Johns Hopkins University , Baltimore, MD, USA
5. Maternal and Child Healthcare Institute, Pudong District , Shanghai, China
6. Maternal and Child Healthcare Hospital, Songjiang District , Shanghai, China
7. Maternal and Child Healthcare Institute, Songjiang District , Shanghai, China