1 Section of Otolaryngology, Department of Basic Medical Science, Neuroscience and Sensory Organs, University of Bari, Italy.
2 U.O.C. of Otolaryngology, Ospedale Di Venere, Carbonara di Bari (BA), Italy.
3 ORL-Asp 6- Palermo, Italy.
4 Section of Otolaryngology, Azienda Area Vasta Romagna-Riccione, Italy.
5 Section of Otolaryngology, ASL BR1 Brindisi, Italy.
6 Section of Otolaryngology, ASP of Agrigento, Italy.
7 ORL Clinic University of Insubriae, Varese, Italy.
8 U.O.C. of Otolaryngology Hospital Maggiore of Bologna, Italy.
9 Department of Sensory Organs, Sapienza University of Roma, Italy.
10 Otorhinolaryngology, Fondazione Policlinico A. Gemelli, Università Cattolica del Sacro Cuore, Rome, Italy.
11 Department of Medicine, Istituto di Ricovero e Cura a Carattere Scientifico (I.R.C.C.S.), Azienda Ospedaliera Universitaria San Martino, Genoa, Italy.