1. Starzl Unit of Abdominal Transplantation, St. Luc University Hospital; Catholic University of Louvain; Brussels Belgium
2. Department of General Surgery and Organ Transplantation, Umberto I Hospital; Sapienza University; Rome Italy
3. Liver Unit, Department of Surgery, Agostino Gemelli Hospital; Catholic University; Rome Italy
4. Gastroenterology and Hepatology, Department of Internal Medicine II; Innsbruck Medical University; Innsbruck Austria
5. Department of Transplantation and Hepatobiliary Surgery; University of Mainz; Mainz Germany
6. Department of Transplant Surgery, Polyclinic Tor Vergata Foundation; Tor Vergata University; Rome Italy