1 ASL Distretto 56 Napoli 3 Sud, Torre Annunziata, Italy.
2 Policlinico Universitario A. Gemelli/Università Cattolica del Sacro Cuore, Otorinolaringoiatria, Rome, Italy.
3 Federico II University of Naples, Department of Neuroscience, Reproductive and Odontostomatological Sciences, Ear Nose Throat Section, Naples, Italy. Electronic address: elena.cantone@unina.it.