1. Department of Obstetrics and Gynecology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
2. Canada–China–New Zealand Joint Laboratory of Maternal and Fetal Medicine, Chongqing Medical University, China
3. Key Laboratory of Birth Defects and Reproductive Health of National Health and Family Planning Commission, Chongqing Population and family planning Science and Technology Research Institute, Chongqing, China
4. Liggins Institute, University of Auckland, Auckland, New Zealand