Ozlem Korkmaz Dilmen1, Hulya Bilgin2. 1. University of Istanbul, Cerrahpasa School of Medicine, Department of Anesthesiology and Intensive Care, Turkey. Electronic address: ozlem.dilmen@istanbul.edu.tr. 2. University of Uludag, School of Medicine, Department of Anesthesiology and Intensive Care, Turkey. Electronic address: hbilgin@uludag.edu.tr.