1. Clinic of Neurosurgery, Cankiri State Hospital, Cankiri, Turkey
2. Department of Neurosurgery, Ankara Yildirim Beyazit University, Ankara, Turkey
3. Clinic of Neurosurgery, Ankara City Hospital, Ankara, Turkey
4. Department of Pathology, Ankara Diskapi Yildirim Beyazit Research and Training Hospital, Ankara, Turkey
5. Private Practitioner, Ankara, Turkey