1. Division of Surgical Oncology, Hiram C Polk Jr Department of Surgery; University of Louisville School of Medicine; Louisville Kentucky
2. Department of Surgery; Academic Medical Center Amsterdam; Amsterdam The Netherlands
3. Carolinas Medical Center; Charlotte North Carolina
4. Johns Hopkins University Hospital; Baltimore Maryland
5. Department of Surgery and Hepatitis Research Center; National Taiwan University Hospital, China and Singapore Universities Graduate Institute of Clinical Medicine, National Taiwan University; Taipei Taiwan