[1] Univ Enna Kore, Dept Med & Surg, I-94100 Enna, Italy
[2] Univ Palermo, Biomed Neurosci & Adv Diagnost Dept, Otorhinolaryngol Sect, I-90127 Palermo, Italy
[3] Catania Univ, Dept Biomed & Surg & Biomed Sci, I-95123 Catania, Italy
[4] Univ Catania, Dept Med Surg Sci & Adv Technol GF Ingrassia, ENT Sect, I-95124 Catania, Italy
[5] Sapienza Univ Rome, Otorhinolaryngol Dept, I-00161 Rome, Italy
[6] Univ Turin, San Luigi Gonzaga Hosp, Dept Otolaryngol, I-10043 Orbassano, Italy
[7] ASP Ragusa Hosp Giovanni Paolo II, I-97100 Ragusa, Italy
[8] IRCCS, San Raffaele Sci Inst, Dept Radiol, I-20132 Milan, Italy
[9] Azienda Osped Univ Policlin G Rodolico San Marco, Dept Anesthesia & Intens Care, I-95123 Catania, Italy