1. Department of Otolaryngology, San Giovanni-Addolorata Hospital, 00100 Rome, Italy
2. Otolaryngology Department, AORMN (Azienda Ospedali Riuniti Marche Nord), 61032 Fano, Italy
3. Department GF Ingrassia, Otolaryngology, University of Catania, 95131 Catania, Italy
4. Organ of Sense Department, University La Sapienza, 00185 Rome, Italy