1. Department of Obstetrics and Gynecology, Seoul National University Bundang Hospital, Seongnam, Korea.
2. Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea.
3. Department of Radiation Oncology, Seoul National University College of Medicine, Seoul, Korea.
4. Department of Oncology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark.
5. Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Korea.