1. ENT Unit, Department of Surgery, Azienda USL - IRCCS di Reggio Emilia, Reggio Emilia, Italy
2. ENT Unit, Santa Maria Goretti Hospital, Azienda USL Latina, Latina, Italy
3. Audiology and Vestibology Service, Centromedico, Bellinzona, Switzerland
4. PhD Program in Clinical and Experimental Medicine, University of Modena and Reggio Emilia, Modena, Italy
5. UOC Audiology and Vestibology, University Hospital Federico II, Naples, Italy
6. ENT and Audiology Unit, DIMES, S.Orsola - Malpighi University Hospital, Bologna, Italy
7. ENT Unit, SS Giovanni e Paolo Hospital, Venice, Italy