1. Departments of Anaesthesia and Intensive Care, Cairns Base Hospital and James Cook University, Cairns, Queensland, and Department of Anaesthesia and Intensive Care Medicine, Leopold-Franzens University, Innsbruck, Austria
2. Department of Anaesthesia and Intensive Care, Cairns Base Hospital, Cairns, Queensland.
3. James Cook University, Department of Anaesthesia and Intensive Care, Cairns Base Hospital, Cairns, Queensland.
4. Department of Anaesthesia and Intensive Care Medicine, Leopold-Franzens University, Innsbruck, Austria.