1. School of Nursing, Midwifery and Paramedicine, University of the Sunshine Coast, Maroochydore, QLD, Australia
2. Centre for Research and Evaluation, Ambulance Victoria, Doncaster, VIC, Australia
3. Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, VIC, Australia
4. Department of Intensive Care and Hyperbaric Medicine, The Alfred Hospital, Melbourne, VIC, Australia
5. School of Public Health and Preventive Medicine, Monash University, Clayton, VIC, Australia
6. Department of Community Emergency Health and Paramedic Practice, Monash University, Frankston, VIC, Australia
7. The Alfred Hospital, Melbourne, VIC, Australia