1. Faculty of Health Sciences, Department of Health Management, Yıldırım Beyazıt University, Ankara, Turkey.
2. Ankara Ulus State Hospital, Ankara, Turkey.
3. Department of Intensive Care, Palliative Care and Anesthesiology, and Reanimation, Ankara Ulus State Hospital, Ankara, Turkey.
4. Department of Anesthesiology and Reanimation, Ankara Ataturk Training and Research Hospital, Ankara, Turkey.