1. Department of Epidemiology and Preventive Medicine; Monash University; Melbourne Victoria Australia
2. Prehospital, Resuscitation and Emergency Care Research Unit (PRECRU); Curtin University; Perth Western Australia Australia
3. Department of Research and Evaluation; Ambulance Victoria; Melbourne Victoria Australia
4. Discipline of Emergency Medicine; University of Western Australia; Perth Western Australia Australia
5. Department of Paramedics; Flinders University; Adelaide South Australia Australia
6. SA Ambulance Service; Adelaide South Australia Australia
7. St John Ambulance Western Australia; Perth Western Australia Australia
8. St John New Zealand; Auckland New Zealand
9. Department of Paramedicine; Auckland University of Technology; Auckland New Zealand
10. Wellington Free Ambulance; Wellington New Zealand
11. Department of Surgery and Anaesthesia; University of Otago; Wellington New Zealand
12. Queensland Ambulance Service; Brisbane Queensland Australia
13. School of Clinical Sciences; Queensland University of Technology; Brisbane Queensland Australia
14. St John Ambulance NT; Darwin Northern Territory Australia
15. Emergency and Trauma Centre; The Alfred; Melbourne Victoria Australia
16. Warwick Medical School; University of Warwick; Coventry UK