1. Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea.
2. Department of Surgery, Yonsei University College of Medicine, Seoul 03722, Republic of Korea.
3. Department of Surgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 06273, Republic of Korea.
4. Department of Surgery, Uijeongbu St. Mary’s Hospital, College of Medicine, Catholic University of Korea, Seoul 11765, Republic of Korea.
5. Department of Surgery, Seoul St. Mary’s Hospital, College of Medicine, Catholic University of Korea, Seoul 06591, Republic of Korea.
6. Department of Surgery, Daejeon St. Mary’s Hospital, College of Medicine, Catholic University of Korea, Seoul 34943, Republic of Korea.