1. Osmangazi University , Faculty of Medicine, Department of Otolaryngology , Eskisehir , Turkey
2. University of Health Sciences , Antalya Training and Research Hospital, Department of Otorhinolaryngology and Head & Neck Surgery , Antalya , Turkey
3. Medeniyet University , Goztepe Training and Research Hospital, Department of Otolaryngology , Istanbul , Turkey
4. Dumlupinar University , Faculty of Medicine, Department of Otolaryngology , Kutahya , Turkey
5. Kırıkkale University , Faculty of Medicine, Department of Otolaryngology, Kırıkkale , Turkey