1 Department of Anesthesiology and Reanimation, School of Medicine, Ataturk University, Erzurum, Turkey; Outcomes Research Consortium, Cleveland Clinic, OH, USA. Electronic address: ilkerince1983@yahoo.com.
2 Department of Anesthesiology and Reanimation, School of Meram Medicine, Necmettin Erbakan University, Konya, Turkey.
3 Intensive Care and Chronic Pain Treatment, Virgen de la Arrixaca University Hospital, Murcia, Spain.
4 Department of General Anesthesiology, Anesthesiology Institute, Cleveland Clinic, Cleveland, OH, USA.
5 Department of Anesthesiology and Reanimation, University Hospital Costa del Sol, Marbella, Spain.