1. Faculty of Medicine, Department of Anesthesia, Erciyes University, Kayseri, Turkey
2. Medical Faculty, Erciyes University, Kayseri, Turkey
3. Department of Neurosurgery, Kayseri Education and Research Hospital, Kayseri, Turkey
4. Medical Faculty, Cukurova University, Adana, Turkey
5. Hakan Çetinsaya Experimantal Animal Center, Erciyes University, Kayseri, Turkey