1. Ankara University Faculty of Medicine, İbn-i Sina Hospital, Department of Anaesthesiology and Intensive Care Unit, Ankara, Turkey

2. Ankara University Brain Research Center (AÜBAUM), Ankara, Turkey

3. University of Lausanne, Department of Anaesthesia, Lausanne, Switzerland

4. University of Bern, Institute for Medical Education, Department of Anaesthesia; Hirslanden Salem-Spital, Institute of Anaesthesiology and Intensive Care, Bern, Switzerland

5. Nykøbing Falster Hospital, Clinic of Anaesthesia, Nykøbing Falster, Denmark