1. School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and NHC Key Laboratory of Health Technology Assessment, Fudan University, Shanghai 200032, China
2. National Human Genetic Resources Center, National Research Institute for Family Planning, Beijing 100081, China
3. Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
4. Department of Maternal and Child Health, National Health Commission of the People’s Republic of China, Beijing 100088, China
5. National Health Commission Key Laboratory of Birth Defects Prevention, Henan Key Laboratory of Population Defects Prevention, Henan 450002, China
6. Wenzhou People’s Hospital/Wenzhou Maternal and Child Health Care Hospital/The Third Clinical Institute Affiliated to Wenzhou Medical University/The Third Affiliated Hospital of Shanghai University, Wenzhou, Zhejiang 325000, China