1. The Third People’s Hospital of Chengdu, Affiliated Hospital of Southwest Jiao Tong University Medical School, Chengdu, China
2. Department of Clinical Medicine, Southwest Medical University, Luzhou, China
3. National Office for Maternal and Child Health Surveillance of China, Department of Obstetrics, West China Second University Hospital, Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Sichuan University, Chengdu, China
4. Department of Obstetrics and Gynecology, West China Second University Hospital, Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Sichuan University, Chengdu, China
5. Key Laboratory for Neuroinformation, Center for Information in Medicine, University of Electronic Science and Technology of China, Chengdu, China
6. Joint Laboratory of Reproductive Medicine, SCU-CUHK, West China Second University Hospital, Sichuan University, Chengdu, China