1. Department of Surgery; Iwate Medical University School of Medicine; 19-1 Uchimaru Morioka Iwate 020-8505 Japan
2. Hepatobiliary Center; Paul Brousse Hospital; Villejuif France
3. Liver Cancer Center; University of Pittsburgh Medical Center; Pittsburgh PA USA
4. Department of Surgery; Seoul National University Bundang Hospital; Seongnam South Korea
5. Division of General and Gastroenterological Surgery; Department of Surgery; Toho University School of Medicine; Tokyo Japan
6. Department of Surgery; Tulane University; New Orleans LA USA