1. Department of Obstetrics and Gynecology, Tianjin Medical University General Hospital, Tianjin, China.
2. Department of Gynecology, Qilu Hospital of Shandong University, Jinan, China.
3. Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing, China.
4. Department of Gynecological Oncology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.
5. Department of Gynecologic Oncology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China.
6. Department of Obstetrics and Gynecology, The Obstetrics & Gynecology Hospital of Fudan University, Shanghai, China.
7. Department of Obstetrics and Gynecology, The Second Hospital of Jilin University, Changchun, China.
8. Department of Gynecologic Oncology, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China.
9. Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
10. Department of Obstetrics and Gynecology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
11. Department of Obstetrics and Gynecology, International Peace Maternity and Child Health Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
12. Department of Obstetrics and Gynecology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.
13. Department of Obstetrics and Gynecology, West China Second Hospital, Sichuan University, Chengdu, China.
14. Department of Gynecology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
15. Department of Gynecologic Oncology, Chongqing University Cancer Hospital & Chongqing Cancer Institute & Chongqing Cancer Hospital, Chongqing, China.