Affiliation: | 1. Department of Surgery, St. Vincent''s Hospital, The Catholic University of Korea, Gyeonggi-do, Seoul, Korea;2. Department of Surgery, Seoul National University College of Medicine, Seoul, Korea;3. Department of Surgery, Korea University College of Medicine, Seoul, Korea;4. Department of Surgery, Sungkyunkwan University School of Medicine, Seoul, Korea;5. Department of Surgery, Seoul National University Cancer Research Institute, Seoul, Korea |