1. Center for Gynecologic Cancer, National Cancer Center, Goyang, Korea.
2. Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Korea.
3. Department of Obstetrics and Gynecology, Chonnam National University Medical School, Gwangju, Korea.
4. Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
5. Department of Obstetrics and Gynecology, Inje University Haeundae Paik Hospital, Busan, Korea.
6. Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul, Korea.
7. Department of Obstetrics and Gynecology, Chungbuk National University Hospital, Cheongju, Korea.
8. Department of Obstetrics and Gynecology, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Korea.
9. Department of Obstetrics and Gynecology, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, Korea.
10. Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
11. Department of Obstetrics and Gynecology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
12. Department of Obstetrics and Gynecology, Korea University College of Medicine, Seoul, Korea.
13. Department of Obstetrics and Gynecology, Konkuk University School of Medicine, Seoul, Korea.