1 Division of Hepatobiliary-Pancreas surgery and Liver Transplantation, Department of Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, 06591 Seoul, Republic of Korea.
2 Division of Hepatobiliary-Pancreas surgery and Liver Transplantation, Department of Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, 06591 Seoul, Republic of Korea. Electronic address: hopej0126@gmail.com.