1. Department of Neurosurgery, Faculty of Medicine, Ankara Yıldırım Beyazıt University, Ankara, Turkey
2. Department of Pathology, Faculty of Medicine Hospital, TOBB University of Economics and Technology, Ankara, Turkey
3. Department of Neurosurgery, Gülhane Faculty of Medicine, University of Health Sciences, Ankara, Turkey
4. Department of Neurosurgery, Ege University Faculty of Medicine, İzmir, Turkey
5. Department of ENT, Faculty of Medicine Hospital, TOBB University of Economics and Technology, Ankara, Turkey
6. Department of Genetics, School of Medicine, Gazi University, Ankara, Turkey
7. TOBB ETU Hospital, Ankara, Turkey