1 General Surgery and Liver Transplantation Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy; Università Cattolica del Sacro Cuore, Rome, Italy. Electronic address: alfonso.avolio@unicatt.it.
2 General Surgery and Transplantation Unit, Policlinico Universitario Umberto I, Rome, Italy.
3 Hepatobiliary Surgery and Liver Transplantation Unit, University Hospital, Padua, Italy.
4 General Surgery and Liver Transplant Unit, Molinette University Hospital, Turin, Italy.
5 Hepatobiliary Surgery and Liver Transplantation, University Hospital Pisa, Italy.