1. The Liver Unit; Queen Elizabeth Hospital Birmingham; Birmingham UK
2. Division of Abdominal Transplantation and Hepatobiliopancreatic Surgery; Bambino Gesù Children's Research Hospital IRCCS; Rome Italy
3. Department of Mathematics; University of Rome Tor Vergata; Rome Italy
4. Department of Hepatobiliary Surgery, Cancer and Transplantation; AP-HP AT; Hôpital Universitaire Paul Brousse; Université Paris-Sud; Villejuif France
5. Department of General, Vascular and Transplant Surgery; University of Tuebingen; Tubingen Germany
6. Division of HPB and Transplant Surgery; Department of Surgery; Erasmus MC; University Medical Center Rotterdam; Rotterdam The Netherlands
7. Department of General Hepatobiliary and Liver Transplantation Surgery; Ghent University Hospital Medical School; Ghent Belgium