1. Otolaryngology, Head and Neck Surgery, Rhinology, A. Gemelli University Hospital Foundation, IRCSS, 00168 Rome, Italy
2. Department of Neurosciences, Otolaryngology Section, University of Padova, 35122 Padova, Italy
3. Otolaryngology Unit, ASST Santi Paolo e Carlo, Department of Health Sciences, University of Milan, 20142 Milan, Italy
4. Department of Neuroscience, Reproductive and Odontostomatological Sciences-ENT Section, University of Naples 29 Federico II, 80131 Naples, Italy
5. Unit of Otorhinolaryngology-Head and Neck Surgery, ASST Spedali Civili Brescia, Department of Medical and Surgical Specialties, Radiological Sciences, and Public Health, University of Brescia, 25123 Brescia, Italy
6. Department of Otorhinolaryngology Head and Neck Surgery, Azienda Ospedaliero-Universitaria Policlinico di Modena, 41124 Modena, Italy
7. Department of Medicine, University of Verona and Verona University Hospital, 37134 Verona, Italy
8. Department of Sense Organs, Sapienza University of Rome, 00185 Rome, Italy
9. ENT Department, Azienda USL Reggio Emilia-IRCCS, 42123 Reggio Emilia, Italy
10. Otorinolaryngology Unit, Head and Neck Department, ASST Sette Laghi and UPLOAD Research Center, University of Insubria, 21100 Varese, Italy
11. Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Department of Clinical Sciences and Community Health, University of Milan, 20122 Milan, Italy
12. Otolaryngology, Audiology and Phoniatric Operative Unit, Department of Surgical, Medical, Molecular Pathology and Critical Care Medicine, Azienda Ospedaliera Universitaria Pisana, University of Pisa, 56124 Pisa, Italy
13. Department of Otorhinolaryngology, Rhinology Unit, Eastern Piedmont University-Maggiore Hospital, 28100 Novara, Italy
14. Department of Otorhinolaryngology, San Luigi Gonzaga Hospital, University of Turin, 10043 Orbassano, Italy
15. Otorhinolaryngology Unit, Head and Neck Department, IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University, 20132 Milan, Italy
16. Otorhinolaryngology Unit, Dip Chirurgie Specialistiche, Ospedale Bellaria AUSL BO, 47814 Bologna, Italy
17. Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, University of Pavia, 27100 Pavia, Italy
18. Otorhinolaryngology Unit, IRCCS Policlinico San Martino Genova, Dipartimento 1 DISC Università di Genova, 16124 Gernova, Italy
19. Department of Otorhinolaryngology, Ospedale San Giuseppe IRCCS Multimedica Milan, 20099 Milan, Italy
20. Department of Medical-Surgical Sciences and Advanced Technologies-“G.F. Ingrassia” Director of E.N.T. Unit P.O. “G. Rodolico” University of Catania, 95123 Catania, Italy
21. Department of Head, Neck and Sensory Organs, Catholic University of The Sacred Heart, 00168 Rome, Italy