1. Department of Obstetrics and Gynecology, CHA Gangnam Medical Center, CHA University School of Medicine, Seoul, Korea.
2. Department of Obstetrics and Gynecology, Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Obstetrics and Gynecology, Seoul National University Bundang Hospital, Seongnam, Korea.
4. Department of Obstetrics and Gynecology, CHA Seoul Fertility Center, CHA University School of Medicine, Seoul, Korea.
5. Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Korea.
6. Department of Obstetrics and Gynecology, Ewha Womans University College of Medicine, Seoul, Korea.
7. Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
8. Department of Obstetrics and Gynecology, Keimyung University School of Medicine, Daegu, Korea.
9. Cancer Healthcare Research Branch and Center for Uterine Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea.