1. Department of Otorhinolaryngology; Medical Faculty, Eskisehir Osmangazi University; Eskisehir Turkey
2. Department of Otorhinolaryngology; Medical Faculty, Kirikkale University; Kirikkale Turkey
3. Ear Nose and Throat (ENT) Department; Liv Hospital; Istanbul Turkey
4. ENT Clinics; Gaziosmanpaşa Taksim Education and Research Hospital; Istanbul Turkey
5. Department of Biostatistics, Medical Faculty; Eskisehir Osmangazi University; Eskisehir Turkey