1. Unit of Cancer Epidemiology; CRO Aviano National Cancer Institute IRCCS; Aviano Italy
2. Department of Epidemiology and Pre-Clinical Research; National Institute for Infectious Diseases “L. Spallanzani” IRCCS; Rome Italy
3. Division of General Surgery and Liver Transplantation; S. Camillo Hospital; Rome Italy
4. Department of Medicine; University of Udine; Udine Italy
5. Multivisceral Transplant Unit, Department of Surgery, Oncology and Gastroenterology; Padua University Hospital; Padua Italy
6. Liver and Multiorgan Transplant Unit; S. Orsola-Malpighi University Hospital; Bologna Italy
7. Department of Gastroenterology and Hepatology, Istituto Mediterraneo per i Trapianti e Terapie ad Alta Specializzazione (ISMETT); University of Pittsburgh Medical Center; Palermo Italy
8. Department of Emergency and Organ Transplantation; Section of Gastroenterology, University Hospital; Bari Italy
9. Department of General Surgery and Organ Transplantation; Umberto I Policlinic, Sapienza University; Rome Italy
10. UOC Transplant Unit, Department of Surgery; Tor Vergata University; Rome Italy
11. Department of Surgery; General and Hepatic Transplantation Surgery Unit, A.O.B. Brotzu; Cagliari Italy