1. Department of Digestive Surgery; Amiens University Medical Center and the Jules Verne University of Picardie; Amiens France
2. Department of Hepatobiliary Surgery; Beaujon Hospital; Clichy France
3. Department of Biostatistics and Clinical Research; Institut Paoli-Calmettes; Marseille France
4. Department of Hepatobiliary and Pancreatic Surgery; Edouard Herriot Hospital; Lyon France
5. Department of Surgery; Swiss Hepato-Pancreato-Biliary (HBP) and Transplantation Center; University Hospital Zurich Zurich Switzerland
6. Department of Digestive Surgery; Lyon University Medical Center; Lyon France
7. Department of Digestive Surgery and Transplantation; Lille University Medical Center; Lille France
8. Department of Digestive Surgical Oncology; Dijon University Hospital School of Medicine; Dijon France
9. Department of Digestive Surgery; Saint Antoine Hospital; Paris France
10. Department of Digestive Surgery and Transplantation; Strasbourg University Medical Center; Strasbourg France
11. Department of Surgical Oncology; Institut Paoli-Calmettes; Marseille France