1. Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
2. Department of Gynecology and Obstetrics, the Central Hospital of Wuhan, Wuhan, P.R. China
3. Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China
4. Department of Gynecologic Oncology, Hunan Province Tumor Hospital, Changsha, P.R. China
5. Women's Reproductive Health Laboratory of Zhejiang Province, Zhejiang, P.R. China
6. Department of Gynecology and Obstetrics, Qilu Hospital, Shandong University, Shandong, P.R. China
7. Department of Obstetrics and Gynecology, The First Affiliated Hospital, Medical School of Xi'an Jiaotong University, Xi'an, P.R. China
8. Department of Gynecologic Oncology, The Second Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, P.R. China
9. Department of Obstetrics and Gynecology, Xiangfan Central Hospital, Tongji Medical College, Huazhong University of Science and Technology, Xiangfan, Hubei, P.R. China
10. Tianjin Central Hospital for Gynecology and Obstetrics, Tianjin, P.R. China
11. Department of Gynecologic Oncology, Zhong Nan Hospital, Wuhan University, Wuhan, P.R. China
12. Commercial Vocational Hospital, Wuhan, P.R. China
13. Department of Obstetrics and Gynecology, The First Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan, P.R. China