1. Centre for Clinical Research in Emergency Medicine; Harry Perkins Institute of Medical Research; Perth Western Australia Australia
2. School of Medicine; The University of Western Australia; Perth Western Australia Australia
3. Emergency Department; Royal Perth Hospital; Perth Western Australia Australia
4. Emergency Department; Fiona Stanley Hospital; Perth Western Australia Australia
5. Emergency Department; Armadale Kelmscott Memorial Hospital; Perth Western Australia Australia
6. Emergency Department; Fremantle Hospital and Health Service; Fremantle Western Australia Australia
7. Emergency Department; South West Health Campus; Bunbury Western Australia Australia
8. Emergency Department; Royal Hobart Hospital; Hobart Tasmania Australia
9. School of Medicine; University of Tasmania; Hobart Tasmania Australia