1. Department of Neurosurgery, System Hospital, Kayseri, Turkey
2. Department of Neurosurgery, Kayseri Community Hospital, Kayseri, Turkey
3. Department of Neurosurgery, Acibadem Altunizade Hospital, Istanbul, Turkey
4. Department of Pathology, Health Sciences University, Kayseri City Training and Research Hospital, Kayseri, Turkey
5. Department of Neurosurgery, Erciyes University, Kayseri, Turkey