1. Department of Anesthesiology, Regional Training and Research Hospital, Erzurum, Turkey;
2. Department of Anesthesiology and Reanimation, Ataturk University School of Medicine, Erzurum, Turkey;
3. Department of Urology, Ataturk University School of Medicine, Erzurum, Turkey;
4. Department of Anesthesiology and Reanimation, Baskent University, Konya, Turkey