1. Department of Neurosurgery, Medical Faculty, of Ataturk University, Erzurum, Turkey
2. Department of Neurosurgery, Medical Faculty of Recep Tayyip, Erdogan University, Rize, Turkey
3. Department of Neurosurgery, University of Health Sciences, Sisli Hamidiye Etfal Training and Research Hospital, Istanbul, Turkey
4. Department of Cardiovascular Surgery, Medical Faculty of Recep Tayyip, Erdogan University, Rize, Turkey
5. Department of Pathology, Medical Faculty, of Ataturk University, Erzurum, Turkey