1. Otorhinolaryngology—Head and Neck Surgery Department, Bakırkoy Dr. Sadi Konuk Training and Research Hospital, 34147 Istanbul, Turkey
2. Department of Otorhinolaryngology, Faculty of Medicine, Osmangazi University, 26480 Eskisehir, Turkey
3. Department of ORL&HNS, Medical School, Dumlupinar University, Central Campus, Tavsanli Yolu 10 km, 43270 Kutahya, Turkey
4. Corlu State Hospital, Department of Otorhinolaryngology, 59850 Tekirdag, Turkey