1. Department of Obstetrics and Gynecology, Beijing Tsinghua Changgung Hospital, Tsinghua University School of Clinical Medicine , Beijing, China
2. Department of Gynecology, Shaanxi Provincial People’s Hospital , Shaanxi, China
3. Department of Gynecology, Women’s Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital , Jiangsu, China
4. Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Chongqing Medical University , Chongqing, China
5. Department of Gynecology, The First Affiliated Hospital of Xi’an Medical University , Shaanxi, China
6. Department of Obstetrics and Gynecology, Shanghai Tong Ren Hospital, Shanghai Jiaotong University School of Medicine , Shanghai, China
7. Department of Gynecology, Obstetrics Women & Children’s Health Care Hospital of Linyi , Shandong, China
8. Department of Gynecology, Taihe Hospital Affiliated Hospital of Hubei University of Medicine , Hubei, China
9. Department of Gynecology, Tianjin Medical University General Hospital , Tianjin, China
10. Department of Gynecology, Urumqi Maternal and Child Health Hospital of Xinjiang Uygur Autonomous Region , Xinjiang, China
11. Department of Gynecology, Xuzhou Central Hospital , Jiangsu, China
12. Department of Obstetrics and Gynecology, The First Affiliated Hospital of Xi’an Jiaotong University , Shaanxi, China
13. Department of Gynecology, Guangdong Women and Children Hospital , Guangdong, China
14. Department of Obstetrics and Gynecology, Peking University Third Hospital , Beijing, China
15. Department of Obstetrics and Gynecology, The First Hospital of Jilin University , Jilin, China
16. Department of Obstetrics and Gynecology, Zhongda Hospital Southeast University , Jiangsu, China
17. Department of Gynecology, Guangzhou First People’s Hospital , Guangdong, China
18. Department of Gynecology, The First People’s Hospital of Chenzhou , Hunan, China
19. Department of Obstetrics and Gynecology, Peking University Shenzhen Hospital , Guangdong, China
20. Department of Obstetrics and Gynecology, The Second Hospital of Jilin University , Jilin, China
21. Department of Gynecology, The First Affiliated Hospital of Xinxiang Medical University , Henan, China
22. Department of Gynecology, Boai Hospital of Zhongshan , Guangdong, China
23. Department of Gynecology, Women and Children’s Hospital of Xiamen University , Fujian, China
24. Department of Reproductive Endocrinology and Gynecology, Zhejiang Provincial People’s Hospital , Zhejiang, China
25. Clinical Research and Development, Jiangsu Hengrui Pharmaceuticals Co., Ltd. , Shanghai, China
26. Department of Biostatistics, School of Public Health, Nanjing Medical University , Jiangsu, China