1. Department of Surgery, Haeundae Paik Hospital; Inje University College of Medicine; Busan Korea
2. Division of Hepatobiliary Surgery and Liver Transplantation, Department of Surgery, Asan Medical Center; Ulsan University College of Medicine, 388-1 Poongnap-dong, Songpa-gu, Seoul 138-736, Korea e-mail: khkim620@amc.seoul.kr