1. General and oncological surgery Unit, Department of Surgical Oncology, National Cancer institute, Centro di Riferimento Oncologico IRCCS, Aviano, Italy
2. Department of Surgery, General surgery and Abdominal Transplant unit, “Papa Giovanni XXIII” Hospital, Bergamo, Italy
3. Pathology Unit, “Papa Giovanni XXIII” Hospital, Bergamo, Italy
4. Gastroenterology and Transplant Hepatology, “Papa Giovanni XXIII” Hospital, Bergamo, Italy