1. Department of Obstetrics and Gynecology, Seoul National University Bundang Hospital, Seongnam, Korea.
2. Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Korea.
3. Branch of Gynecologic Cancer Research, National Cancer Center, Goyang, Korea.
4. Department of Radiation Oncology, Seoul National University College of Medicine, Seoul, Korea.
5. Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea.