Gulcin Aydin1, Isin Gencay2, Selim Colak2. 1. Kirikkale University, School of Medicine, Department of Anesthesiology and Reanimation, Kirikkale, Turkey. Electronic address: drgulcinaydin@yahoo.com. 2. Kirikkale University, School of Medicine, Department of Anesthesiology and Reanimation, Kirikkale, Turkey.