1 From the Health Services Management and Research Unit, Department of Anaesthesiology, Pharmacology and Intensive Care, Division of Anaesthesia, Geneva University Hospitals, Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia (GH); Department of Anaesthesiology, Pharmacology and Intensive Care, Division of Anaesthesia, Geneva University Hospitals, Geneva (CD); Department of Anaesthesiology, Pharmacology and Intensive Care, Division of Anaesthesia, Geneva University Hospitals, Geneva (CM); Department of Anaesthesiology, Pharmacology and Intensive Care, Division of Anaesthesia, Geneva University Hospitals, Geneva (DZ); and University of Geneva, Switzerland (FC).