1. Yeditepe University Faculty of Medicine, Department of Anaesthesiology and Reanimation İstanbul, Turkey
2. Etlik City Hospital, Clinic of Anaesthesiology and Reanimation, Ankara, Turkey
3. İstanbul University-Cerrahpaşa, Cerrahpaşa Faculty of Medicine, Department of Anaesthesiology and Reanimation (Professor Emeritus), İstanbul, Turkey