1. Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Osaka, Japan.
2. Department of Obstetrics and Gynecology, The Jikei University School of Medicine, Tokyo, Japan.
3. Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
4. Gynecologic Cancer Research Center, Cheng Gung Memorial Hospital, Taoyuan, Taiwan.
5. Department of Gynecologic Oncology, Fudan University Cancer Institute, Shanghai, P.R. China.
6. Department of Obstetrics and Gynecology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.