1. Department of Neurosurgery, Medical Faculty of Ataturk University, Erzurum, Turkey
2. Medical Faculty of Cerrapasa, Istanbul University, Istanbul, Turkey
3. Department of Pediatric Surgery, Medical Faculty of Ataturk University, Erzurum, Turkey
4. Department of Anesthesiology and Reanimation, Medical Faculty of Ataturk University, Erzurum, Turkey
5. Department of General Surgery, Medical Faculty of Ataturk University, Erzurum, Turkey
6. Department of Pharmacology, Medical Faculty of Ataturk University, Erzurum, Turkey
7. Department of Pathology, Medical Faculty of Ataturk University, Erzurum, Turkey