1. Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou 510150, China
2. National Health Commission of the People’s Republic of China, Beijing 100044, China
3. Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu 610041, China
4. Administration Office, Chongqing Health Center for Women and Children, Chongqing 401120, China
5. Department of Obstetrics and Gynecology, Peking University First Hospital, Beijing Key Laboratory of Maternal Fetal Medicine of Gestational Diabetes Mellitus, Beijing 100034, China
6. Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100083, China
7. Department of Obstetrics and Gynecology, Affiliated Hospital of Nantong University, Nantong 226001, China
8. Department of Obstetrics and Gynecology, Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China