1. Melbourne Medical School; The University of Melbourne; Melbourne Victoria Australia
2. Emergency Department; Royal Melbourne Hospital; Melbourne Victoria Australia
3. Emergency Department; Dandenong Hospital; Melbourne Victoria Australia
4. Department of Medicine; Monash University; Melbourne Victoria Australia
5. Emergency Department; Geelong Hospital; Geelong Victoria Australia
6. Emergency and Trauma Centre; The Alfred Hospital; Melbourne Victoria Australia
7. Department of Epidemiology and Preventive Medicine; Monash University; Melbourne Victoria Australia