1. Department of Gynecologic Oncology Fudan University Shanghai Cancer Center Shanghai, 200032 Shanghai P. R. China
2. Department of Oncology Shanghai Medical College of Fudan University Shanghai, 200032 Shanghai P. R. China
3. Department of Obstetrics and Gynecology Sir Run Run Shaw Hospital Zhejiang University School of Medicine Hangzhou, 310016 Zhejiang P. R. China
4. Department of Gynecology Zhejiang Provincial People's Hospital People's Hospital of Hangzhou Medical College Hangzhou, 310014 Zhejiang P. R. China
5. Department of Gynecology Jinhua Municipal Central Hospital Medical Group Jinhua, 321000 Zhejiang P. R. China
6. Department of Obstetrics and Gynecology Huzhou Central Hospital Huzhou, 313000 Zhejiang P. R. China
7. Department of Obstetrics and Gynecology Jiaxing University Affiliated Women and Children Hospital Jiaxing, 314051 Zhejiang P. R. China
8. Department of Gynecology Hwa Mei Hospital University of Chinese Academy of Sciences (Ningbo No. 2 Hospital) Ningbo, 315010 Zhejiang P. R. China
9. Department of Gynecology The Second Affiliated Hospital of Jiaxing University Jiaxing, 314001 Zhejiang P. R. China