1. Gynecologic Oncology Research Branch, Research Institute and Hospital, National Cancer Center; Goyang Republic of Korea
2. Department of Obstetrics and Gynecology; University of Ulsan College of Medicine, Asan Medical Center; Seoul Republic of Korea
3. Department of Obstetrics and Gynecology, Samsung Medical Center; Sungkyunkwan University School of Medicine; Seoul Republic of Korea
4. Department of Obstetrics and Gynecology, College of Medicine; Seoul National University; Seoul Republic of Korea
5. Department of Obstetrics and Gynecology; Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences; Seoul Republic of Korea
6. Department of Gynecology; Obstetrics and Gynecology Hospital of Fudan University; Shanghai China
7. Department of Obstetrics and Gynecology; Seoul National University Bundang Hospital; Seongnam Republic of Korea
8. Department of Obstetrics and Gynecology; Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine; Seoul Republic of Korea
9. Department of Obstetrics and Gynecology, Gangnam Severance Hospital; Yonsei University College of Medicine; Seoul Republic of Korea
10. Department of Gynecology, Graduate School of Medicine; Hokkaido University; Sapporo Japan
11. Department of Obstetrics and Gynecology; Chonnam National University Medical School; Gwangju Republic of Korea
12. Department of Obstetrics and Gynecology, Institute of Women's Life Science; Yonsei University College of Medicine; Seoul Republic of Korea
13. Department of Obstetrics and Gynecology, CHA Gangnam Medical Center; CHA University; Seoul Republic of Korea
14. Department of Obstetrics and Gynecology, Busan Paik Hospital, College of Medicine; Inje University; Busan Republic of Korea
15. Department of Obstetrics and Gynecology, Ewha Womans University Mokdong Hospital; Ewha Womans University School of Medicine; Seoul Korea