1. Department of Otolaryngology, Head and Neck Surgery, University of Health Sciences, Dışkapı Yıldırım Beyazıt Training and Research Hospital, Ankara, Turkey
2. Department of Pathology, University of Health Sciences, Dışkapı Yıldırım Beyazıt Training and Research Hospital, Ankara, Turkey
3. Department of Otolaryngology, Head and Neck Surgery, Faculty of Medicine, Ankara Yıldırım Beyazıt University, Turkey