1. Kayseri Research and Training Hospital, Department of Pathology, Kayseri, Turkey
2. Yildirim Beyazit University, Department of Pathology, Ankara, Turkey
3. Diskapi Yildirim Beyazit Research and Training Hospital, Department of Ear-Nose-Throat, Ankara, Turkey
4. Diskapi Yildirim Beyazit Research and Training Hospital, Department of Pathology, Ankara, Turkey