1 Otorhinolaryngology Clinic, Department of Medical and Surgical Sciences and Advanced Technologies "GF Ingrassia", ENT Section, University of Catania, Italy.
2 Department of Neurosciences, Section of Otolaryngology and Regional Centre for Head and Neck Cancer, University of Padua, Treviso, Italy.
3 Department of Surgery, Oncology and Gastroenterology, Section of Oncology and Immunology, University of Padua, Padua, Italy.
4 Otorhinolaryngology, Head and Neck Surgery Unit, Department of Mental and Physical Health and Preventive Medicine, 'Luigi Vanvitelli' University of Campania, Naples, Italy.