1. Department of Anesthesiology and Reanimation, Konya Training and Research Hospital, Konya, Turkey
2. Department of Brain and Nerve Surgery, Konya Training and Research Hospital, Konya, Turkey
3. Department of Anesthesiology and Reanimation, Ordu University, Ordu, Turkey
4. Department of Brain and Nerve Surgery, Ordu University, Ordu, Turkey