1. Department of Otorhinolaryngology, Faculty of Medicine; Osmangazi University; Eskisehir Turkey
2. Department of Otorhinolaryngology, Faculty of Medicine; Dumlupinar University; Kutahya Turkey
3. Department of Otorhinolaryngology, Faculty of Medicine; Celal Bayar University; Manisa Turkey
4. Department of Otorhinolaryngology; Tepecik Training and Research Hospital; Izmir Turkey
5. Department of Otorhinolaryngology, Faculty of Medicine; Karadeniz Technical University; Trabzon Turkey