From Baflkent University Otolaryngology Department, Ankara, Turkey
2.Servicio ORL Fundacion Jimenez Diaz - Clinica Nuestra Senora Concepcion, Madrid - Spain
3.Department of Neurology and Otolaryngology, University La Sapienza, Viale del Policlinico
4.From the Department of Otorhinolaryngology, Head & Neck Surgery, KBC Salata, University of Zagreb, Croatia; Department of Otorhinolaryngology, Head & Neck Surgery
5.From the Department of ENT, North University Hospital, Marseille, France
6.From the Otolaryngology Department of Aristotle University, Thessaloniki, Greece
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