1. General Surgery Department, Fondazione IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy
2. Hepatology and Transplantation Laboratory, Department of Surgery, Faculty of Medicine, University of Geneva, Geneva, Switzerland
3. Divisions of Abdominal and Transplantation Surgery, Department of Surgery, Geneva University Hospitals, Geneva, Switzerland
4. Department of Clinical, Surgical, Diagnostic and Paediatric Sciences, University of Pavia, Pavia, Italy