1. Faculty of Medicine, Department of Neurosurgery, Kirikkale University, Kirikkale, Turkey
2. Faculty of Medicine, Department of Physical Medicine and Rehabilitation, Kirikkale University, Kirikkale, Turkey
3. Faculty of Medicine, Department of Anesthesiology and Reanimation, Kirikkale University, Kirikkale, Turkey
4. Department of Neurosurgery, Yildirim Beyazit University Yenimahalle Training and Research Hospital, Ankara, Turkey
5. Faculty of Medicine, Department of Neurosurgery, Hitit University, Çorum, Turkey