1. Otorhinolaryngology Department ULSS 17, General Hospital of Monselice, Via G. Marconi 19, Monselice, 35043 Padua, Italy
2. Otorhinolaryngology Department ULSS 13, General Hospitals of Dolo and Mirano, Via Mariutto 76, Mirano, 30035 Venice, Italy
3. Head and Neck Department, ENT Clinic, Hospital of Cattinara, University of Trieste, Strada di Fiume 447, 34149 Trieste, Italy