1. Department of Trauma and Surgical Critical Care; Seoul St. Mary's Hospital; College of Medicine; The Catholic University of Korea; Seoul Korea
2. Department of Hepato-biliary and Pancreas Surgery; Incheon St. Mary's Hospital; College of Medicine; The Catholic University of Korea; Seoul Korea
3. Department of Hepato-biliary and Pancreas Surgery; Seoul St. Mary's Hospital; College of Medicine; The Catholic University of Korea; Seoul Korea
4. Department of Hepato-biliary and Pancreas Surgery; Uijeongbu St. Mary's Hospital; College of Medicine; The Catholic University of Korea; Seoul Korea
5. Department of Hepato-biliary and Pancreas Surgery; St. Paul's Hospital; College of Medicine; The Catholic University of Korea; Seoul Korea