1. Emergency Department, Royal North Shore Hospital, St Leonards, New South Wales, Australia
2. Prehospital & Retrieval Medicine, Aeromedical Operations, NSW Ambulance, Bankstown Aerodrome, New South Wales, Australia
3. Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia
4. Malcolm Fisher Department of Intensive Care Medicine, Royal North Shore Hospital, St Leonards, New South Wales, Australia
5. Division of Critical Care, The George Institute for Global Health, University of New South Wales, Sydney, Australia
6. Northern Clinical School, Faculty of Medicine, University of Sydney, Sydney, New South Wales, Australia
7. Australian and New Zealand Intensive Care Research Centre, Department of Epidemiology and Preventative Medicine, Monash University, Melbourne, Victoria, Australia
8. The George Institute for Global Health, University of New South Wales, Sydney, Australia
9. Critical Care Research, Illawarra Shoalhaven Local Health District, Wollongong, New South Wales, Australia