1 Department of Anaesthesiology and Reanimation, Ondokuz Mayis University Faculty of Medicine, Samsun, Turkey.
2 Department of General Surgery, Ondokuz Mayis University Faculty of Medicine, Samsun, Turkey.
3 Department of Anaesthesiology and Reanimation, Ondokuz Mayis University Faculty of Medicine, Samsun, Turkey. Electronic address: burhandost@hotmail.com.