1. Radiology Unit, IRCCS Ospedale Policlinico San Martino,16132 Genova, Italy
2. Department of Internal Medicine and Medical Specialties, University of Genova, 16100 Genova, Italy
3. Otorhinolaryngology Unit, IRCCS Ospedale Policlinico San Martino, 16132 Genova, Italy
4. Department of Surgical Science (DISC), University of Genova, 16100 Genova, Italy
5. Medical Oncology Unit, IRCCS Ospedale Policlinico San Martino, 16132 Genova, Italy
6. Gastroenterology Unit, Department of Internal Medicine, IRCCS Ospedale Policlinico San Martino, University of Genova, 16132 Genova, Italy
7. Department of Medicine and Surgery, University of Parma, 43121 Parma, Italy
8. Maxillo-Facial Surgery Unit, IRCCS Ospedale Policlinico San Martino, 16132 Genova, Italy