1. National Institute of Gastroenterology “S. De Bellis”, IRCCS Research Hospital, 70013 Castellana Grotte, Italy
2. Hepatobiliary Surgery Unit, Foundation “Policlinico Universitario A. Gemelli”, IRCCS, Catholic University, 00168 Rome, Italy
3. Department of Surgery, General and Hepatobiliary Surgery, University Hospital G.B. Rossi, University and Hospital Trust of Verona, 37126 Verona, Italy
4. Oncobell Program, Bellvitge Biomedical Research Institute (IDIBELL), CIBEREHD and University of Barcelona, 08908 L’Hospitalet de Llobregat, Spain