1. ENT Department; San Raffaele Scientific Hospital; Milan Italy
2. Headache Unit, Department of Neurology; San Raffaele Scientific Hospital; Milan Italy
3. Dipartimento di Scienze; Chirurgiche Università di Torino; Turin Italy
4. U.O.S.D. “Vestibologia e Otorinolaringoiatria” Presidio Ospedaliero “Giovanni Paolo II,”; Policoro MT Italy
5. Department of Otolaryngology, Spedali Civili; University of Brescia; Brescia Italy
6. Otoneurology Unit, Department of Otorhinolaryngology, University Hospital of Salamanca, IBSAL, Salamanca, Spain; Skull Base Unit, Department of Otorhinolaryngology; University Hospital of Salamanca, IBSAL; Salamanca Spain
7. Department of Otorhinolaryngology-Pisa University Medical School Otorhinolaryngology; Pisa University Medical School; Pisa Italy
8. Otology and Neurotology Group, Department of Genomic Medicine, Centre for Genomics and Oncological Research (GENYO); Pfizer-University of Granada-Junta de Andalucia; Granada Spain
9. Department of Otolaryngology; Hospital San Agustin; Linares Jaen Spain
10. Department of Otorhinolaryngology-Head and Neck Surgery; Poliambulanza Foundation Hospital; Brescia Italy
11. Otology & Neurotology Group CTS495, Department of Genomic Medicine, GENYO-Centre for Genomics and Oncological Research; Pfizer/University of Granada/Junta de Andalucia, PTS; Granada Spain
12. Division of Otoneurology; Department of Otolaryngology, Hospital Universitario Virgen de las Nieves; Granada Spain
13. Otology and Skull Base Unit; Azienda Ospedaliera Universitaria Senese; Siena Italy
14. Department of Neurosciences, Imaging and Clinical Sciences; University of Chieti-Pescara; Chieti Italy
15. Unit of Audiology, Department of Surgical Sciences and Translational Medicine, Careggi Hospital; University of Florence; Florence Italy
16. University of Campania Luigi Vanvitelli; Naples Italy
17. Department of Otolaryngology; University Hospital of Getafe; Madrid Spain
18. Department of Neurosciences, Headache Centre; University of Parma; Parma Italy