1. Department of Diagnostic Imaging, Oncologic Radiotherapy and Hematology, Fondazione Policlinico Universitario A. Gemelli IRCCS, L.go A. Gemelli 8, 00168 Rome, Italy
2. Internal Medicine and Gastroenterology-Hepatology Unit, Fondazione Policlinico Universitario A. Gemelli IRCCS, L.go A. Gemelli 8, 00168 Rome, Italy
3. Facoltà di Medicina e Chirurgia, Università Cattolica del Sacro Cuore, L.go F. Vito 1, 00168 Rome, Italy
4. Division of Image-Guided Therapy, Department of Radiology, Hadassah Hebrew University Medical Center, Jerusalem 12000, Israel