1. Department of Critical Care, Ankara Bilkent City Hospital
2. Department of Anesthesiology and Reanimation, University of Yildirim Beyazit, Faculty of Medicine, Ankara Bilkent City Hospital, Ankara, Turkey
3. Department of Anesthesiology and Reanimation, University of Health Sciences, Gulhane Faculty of Medicine, Ankara Bilkent City Hospital, Ankara, Turkey