1. Department of Neurosurgery, Oncology Training and Research Hospital, Ankara, Turkey
2. Department of Neurosurgery, Baskent University Hospital, Konya, Turkey
3. Department of Pathology, Baskent University Hospital, Konya, Turkey
4. Department of Physical Therapy and Rehabilitation, Diskapi Yildirim Beyazit Education and Research Hospital, Ankara, Turkey