1. Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Jinan, P.R. China.
2. Gynecology Oncology Key Laboratory, Qilu Hospital of Shandong University, Jinan, P.R. China.
3. Department of Gynecologic Oncology, Women’s Hospital, School of Medicine, Zhejiang University, Hangzhou, P.R. China.
4. Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, P.R. China.
5. Department of Obstetrics and Gynecology, Peking University People’s Hospital, Beijing, P.R. China.