1. Department of Obstetrics & Gynecology, Soonchunhayng University Bucheon Hospital, Soonchunhayng University College of Medicine, Bucheon, South Korea
2. Department of Obstetrics & Gynecology, Guro Hospital, Korea University College of Medicine, Seoul, South Korea
3. Center for Gynecologic Cancer, National Cancer Center, Goyang, South Korea
4. Department of Obstetrics & Gynecology, Samsung Medical Center, Sungkyunkwan University, Seoul, South Korea
5. Department of Obstetrics & Gynecology, Institute of Women’s Life Medical Science, Yonsei University College of Medicine, Seoul, South Korea