1. Department of Surgery, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Korea.
2. Department of Surgery, Seoul National University Hospital, Seoul, Korea.
3. Department of Radiology, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Korea.
4. Department of Pathology, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Korea.
5. Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Korea.
6. Department of Radiation Oncology, Seoul National University Hospital, Seoul, Korea.
7. Department of Obstetrics and Gynecology, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Korea.