1. Division of Abdominal Surgery and Organ‘s Transplantation; Department of Surgery; Catholic University; Rome; Italy
2. Division of Transplantation; Department of Surgery; University of Washington; Seattle; WA
3. Gastroenterology Section; Department of Surgical and Gastroenterological Sciences; University of Padua; Padua; Italy
4. Swiss Hepato-Pancreatico-Biliary and Transplantation Center; Department of Surgery; University Hospital Zürich; Zürich; Switzerland