1. Department of Otorhinolaryngology-Head and Neck Surgery (ORL&HNS); Bakırkoy Dr. Sadi Konuk Education and Research Hospital; Istanbul Turkey
2. Department of ORL & HNS; Tokat Erbaa State Hospital; Tokat Turkey
3. Department of ORL & HNS; Dumlupinar University, Faculty of Medicine; Kutahya Turkey
4. Department of Neurotology; the University of Miami, Miller School of Medicine; Miami Florida U.S.A.
5. Department of ORL & HNS; Cankiri State Hospital; Cankiri Turkey