Uludag University Faculty of Medicine, Department of Otolaryngology Head and Neck Surgery – Bursa – Turkey; Uludağ Üniversitesi Tıp Fakültesi Kulak Burun Boğaz A.D
2.Hacettepe University Faculty of Medicine Department of Radiology – Ankara – Turkey
3.Bursa Dörtçelik Children’s Hospital
4.Department of Otorhinolaryngology Head and Neck Surgery, Hacettepe University Faculty of Medicine, Ankara/Turkey