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