1. Department of Obstetrics and Gynecology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
2. Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
3. Department of Obstetrics and Gynecology, School of Medicine, Kyung Hee University Medical Center, Kyung Hee University, Seoul, Korea.
4. Center for Gynecologic Cancer, National Cancer Center, Goyang, Korea.
5. Comprehensive Gynecologic Cancer Center, CHA Bundang Medical Center, College of Medicine, CHA University, Seongnam, Korea.
6. Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Seoul, Korea.
7. Department of Obstetrics and Gynecology, Seoul National University Bundang Hospital, Seongnam, Korea.