1. Hepatobiliary Surgery Unit, A. Gemelli Hospital, Catholic University of the Sacred Heart, Rome, Italy
2. Division of General Surgery A, Department of Surgery, University of Verona, Verona, Italy
3. Liver Unit, San Raffaele Hospital, Milan, Italy
4. Department of Digestive and Hepatobiliary Surgery, Mauriziano Umberto I Hospital, Turin, Italy
5. Unit of Hepatobiliary Surgery and Liver Transplantation, Cardarelli Hospital, Naples, Italy
6. Department of Medical and Surgical Sciences, Surgical Clinic, Brescia University, Brescia, Italy
7. Department of Surgery, Maggiore Hospital, Bologna, Italy
8. Department of Surgery and Transplantation, Sant’Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy