1 Division of Otolaryngology, Department of Surgery, Dentistry Pediatrics and Gynecology, University of Verona, Verona, Italy.
2 Division of Otolaryngology, Department of Surgery, Dentistry Pediatrics and Gynecology, University of Verona, Verona, Italy. Electronic address: cerulloraffaele@alice.it.
3 Division of Otolaryngology, "San Maurizio" Hospital, Bolzano, Italy.