1. Department of Digestive and Minimally Invasive Surgery; AP-HP, Antoine Béclère Hospital; 157 rue de la Porte de, Trivaux 92141 Clamart Cedex France
2. Department of Digestive Diseases; Montsouris Institute; 75014 Paris France
3. Department of Digestive and Hepatobiliary Surgery and Liver Transplantation; AP-HP, Henri-Mondor Hospital; 94010 Créteil France
4. Hepatobiliary-Pancreatic and Laparoscopic Surgical Unit, Southampton General Hospital; Southampton University Hospitals, NHS Trust; Southampton UK
5. Department of Hepatobiliary Surgery and Liver Transplantation; AP-HP, Saint-Antoine Hospital; 75012 Paris France
6. Department of Hepatopancreatobiliary and Gastrointestinal Surgery, Intervention Centre; Oslo University Hospital-Rikshospitalet; Oslo Norway
7. General Surgery and Transplantation Unit; San Camillo Hospital; Rome Italy
8. HPB, Minimal Access and Robotic Surgery; Maastricht University Medical Center; Maastricht The Netherlands
9. Department of General and Hepato-Pancreato-Biliary Surgery; S.M. Loreto Nuovo Hospital; Naples Italy
10. Department of Hepatobiliary Surgery and Liver Transplantation; University Hospital Virgen de la Arrixaca; El Palmar Murcia Spain
11. Paris-Sud University; 91405 Orsay France