1. Department of Surgical Science, ENT Unit, Santa Maria Goretti Hospital, Latina, Italy.
2. ENT Unit, Department of Surgery, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy.
3. Audiology & Vestibology Service, Centromedico, Bellinzona, Switzerland.
4. Department of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy.