1. Istanbul Research and Training Hospital, Otorhinolaryngology Clinic, Istanbul, Turkey
2. Istanbul Bakirkoy Dr. Sadi Konuk Research and Training Hospital, Otorhinolaryngology, Istanbul, Turkey
3. Istanbul Bakirkoy Dr. Sadi Konuk Research and Training Hospital, Audiology, Istanbul, Turkey
4. Istanbul Bakirkoy Dr. Sadi Konuk Research and Training Hospital, Otorhinolaryngology Clinic, Istanbul, Turkey