1. Otolaryngology Unit, San Camillo Forlanini Hospital, 00152 Rome, Italy
2. Department of Radiation Oncology, San Camillo Forlanini Hospital, 00152 Rome, Italy
3. U.O.C. Radioterapia Oncologica, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, 00168 Rome, Italy
4. Neuroradiology Unit, San Camillo Forlanini Hospital, 00152 Rome, Italy