1. Unit of Cancer EpidemiologyCRO Aviano National Cancer InstituteAviano Italy
2. Department of Epidemiology and Pre‐Clinical ResearchNational Institute for Infectious Diseases “L. Spallanzani”Rome Italy
3. Division of General Surgery and Liver TransplantationS. Camillo HospitalRome Italy
4. Liver and Multiorgan Transplant UnitS. Orsola‐Malpighi University HospitalBologna Italy
5. Department of Gastroenterology and HepatologyIstituto Mediterraneo per i Trapianti e Terapie ad Alta Specializzazione (ISMETT), University of Pittsburgh Medical CenterPalermo Italy
6. Department of MedicineUniversity of UdineUdine Italy
7. Department of Emergency and Organ Transplantation, Section of GastroenterologyUniversity HospitalBari Italy
8. Multivisceral Transplant Unit, Department of Surgery, Oncology and GastroenterologyPadua University HospitalPadua Italy
9. Department of General Surgery and Organ TransplantationUmberto I Policlinic, Sapienza UniversityRome Italy
10. UOC Transplant Unit, Department of SurgeryTor Vergata UniversityRome Italy
11. Department of SurgeryGeneral and Hepatic Transplantation Surgery Unit, A.O.B. BrotzuCagliari Italy