1. Department of Otolaryngology, Ankara Sehir Hospital (Formerly Ankara Numune Education and Research Hospital), Ankara, Turkey
2. Department of Biochemistry, Ufuk University, Ankara, Turkey
3. ENT Clinic, Kahramankazan State Hospital, Ankara, Turkey
4. Department of Otolaryngology, Ankara Medipol University, Ankara, Turkey
5. ENT Clinic, Medisun Cayyolu Hospital, Ankara, Turkey
6. Department of Otolaryngology, Yıldırım Beyazıt University, Ankara, Turkey