1. Dipartimento di Chirurgia Generale e Trapianti IRCCS Azienda Ospedaliero‐Universitaria di Bologna Bologna Italy
2. Department of Medical and Surgical Sciences (DIMEC) University of Bologna Bologna Italy
3. Department of HBP and GI Surgery Hôpital Pontchaillou Université de Rennes Rennes France
4. General and Liver Transplant Surgery Unit Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Milano Milano Italy