1. Department of Emergency Medicine; Barwon Health; Geelong Victoria Australia
2. Intensive Care Unit; Barwon Health; Geelong Victoria Australia
3. Emergency and Trauma Centre; The Alfred Hospital; Melbourne Victoria Australia
4. Department of Epidemiology and Preventive Medicine; Australian and New Zealand Intensive Care Research Centre (ANZIC-RC); The Alfred Centre; Monash University; Melbourne Victoria Australia
5. School of Medicine; Deakin University; Geelong Victoria Australia
6. Emergency Department; St John of God Hospital; Geelong Victoria Australia