1. Department of Clinical Medicine and Surgery, University of Naples Federico II, Medical School, Naples, Italy
2. Department of Surgical Sciences, University of Perugia, Perugia, Italy
3. Department of Surgery, Military Medical Academy, Sofia, Bulgaria
4. Department of Radiology, “Istituto Nazionale Tumori IRCCS Fondazione G. Pascale – Napoli”, Naples, Italy
5. Department of Surgical Oncology, Hepatobiliary Unit, “Istituto Nazionale Tumori IRCCS Fondazione G. Pascale – Napoli”, Naples, Italy