1. Department of Anesthesiology, Balıkesir Education and Research Hospital, Balıkesir, Turkey
2. Department of Anesthesiology, Konya Numune Hospital, Konya, Turkey
3. Department of Anesthesiology, Yeditepe University, Istanbul, Turkey
4. Department of Anesthesiology, Selcuk University, Konya, Turkey
5. Outcomes Research Consortium, Cleveland Clinic, Anesthesiology Institute, Cleveland, OH, USA
6. Department of Anesthesiology, Canakkale 18 Mart University, Canakkale, Turkey