1. School of Public Health and Social Work; Queensland University of Technology; Brisbane; QLD
2. Emergency Department; The Townsville Hospital, and Anton Breinl Centre for Public Health and Tropical Medicine; James Cook University; Townsville; QLD
3. Mater Health Services; Careflight Medical Services Qld, and University of Queensland Medical School; Brisbane; QLD
4. Centre for Accident Research and Road Safety Queensland; School of Psychology and Counseling, and National Centre for Health Information Research and Training; School of Public Health; Queensland University of Technology; Brisbane; QLD
5. Clinical Performance & Service Improvement Unit; Queensland Ambulance Service; Brisbane; QLD; Australia