1. Department of Otorhinolaryngology ; Aksaray State Hospital; Aksaray Turkey
2. Department of Otorhinolaryngology ; Gazi University Medicine Faculty; Ankara Turkey
3. Department of Otorhinolaryngology ; Amasya University; S.S. Training and Research Hospital; Amasya Turkey
4. Department of Otorhinolaryngology ; Kars State Hospital; Kars Turkey
5. Department of Otorhinolaryngology ; Ankara Numune Training and Research Hospital; Ankara Turkey
6. Department of Hearing, Speech and Vestibular Disorders ; Ankara Numune Training and Research Hospital; Ankara Turkey