Giuseppe Maria Ettorre1, Roberto Luca Meniconi2. 1. Division of General Surgery and Liver Transplantation, S. Camillo-Forlanini Hospital, Circonvallazione Gianicolense 87, Rome, Italy. gmettorre@scamilloforlanini.rm.it. 2. Division of General Surgery and Liver Transplantation, S. Camillo-Forlanini Hospital, Circonvallazione Gianicolense 87, Rome, Italy.