1. Department of Obstetrics and Gynecology, CHA Gangnam Medical Center, CHA University, Seoul, Korea.
2. Department of Obstetrics and Gynecology, Konkuk University School of Medicine, Seoul, Korea.
3. Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
4. Department of Obstetrics and Gynecology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
5. Department of Obstetrics and Gynecology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
6. Cancer Healthcare Research Branch, Center for Uterine Cancer and Center for Clinical Trials, Research Institute and Hospital, and Department of Cancer Control and Population Health, Graduate School of Cancer Science and Policy, National Cancer Center, Goyang, Korea.
7. Department of Obstetrics and Gynecology, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea.
8. Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul, Korea.
9. Department of Obstetrics and Gynecology, Ajou University School of Medicine, Suwon, Korea.