[1] Ankara Yildirim Beyazit Univ, Dept Neurosurg, Sch Med, TR-06800 Ankara, Turkey
[2] Koc Univ Hosp, Dept Pathol, Istanbul, Turkey
[3] Acibadem Mehmet Ali Aydinlar Univ, Vocat Sch Hlth Sci, Dept Neurosurg, Istanbul, Turkey
[4] Acibadem Mehmet Ali Aydinlar Univ, Vocat Sch Hlth Sci, Dept Electroneurophsiol, Istanbul, Turkey
[5] Hacettepe Univ, Dept Pathol, Sch Med, Ankara, Turkey
[6] Hacettepe Univ, Dept Neurosurg, Sch Med, Ankara, Turkey