1. Klinik für Wirbelsaulen Chirurgie und Neurotraumatologie , 8060 , Zwickau , Germany
2. Çukurova University Faculty of Medicine , Department of Neurosurgery, Balcalı Hospital , Adana 01330 , Turkey
3. Tepecik Education and Research Hospital , Department of Neurosurgery , İzmir , Turkey
4. Acibadem University School of Medicine , Department of Radiology, Acibadem Adana Hospital , Adana , Turkey
5. Acibadem University School of Medicine , Department of Neurosurgery, Acibadem Adana Hospital , Adana , Turkey