1. Simpson Centre for Health Services Research, South Western Sydney Clinical SchoolThe University of New South Wales Sydney New South Wales Australia
2. Ingham Institute for Applied Medical Research Sydney New South Wales Australia
3. School of Public Health and Community MedicineThe University of New South Wales Sydney New South Wales Australia
4. Susan Wakil School of Nursing and Midwifery, Faculty of MedicineThe University of Sydney Sydney New South Wales Australia
5. School of Public Health and Social WorkQueensland University of Technology Brisbane Queensland Australia
6. Division of Emergency Medicine, Faculty of Health and Medical SciencesThe University of Western Australia Perth Western Australia Australia
7. Centre for Clinical Research in Emergency MedicineHarry Perkins Institute of Medical Research Perth Western Australia Australia
8. Emergency DepartmentRoyal Perth Hospital Perth Western Australia Australia
9. Psychiatry Research and Teaching UnitLiverpool Hospital, New South Wales Health Sydney New South Wales Australia
10. School of Psychiatry, Faculty of MedicineThe University of New South Wales Sydney New South Wales Australia
11. School of Nursing and MidwiferyEdith Cowan University Perth Western Australia Australia
12. Prince of Wales Clinical SchoolThe University of New South Wales Sydney New South Wales Australia
13. Emergency DepartmentPrince of Wales Hospital Sydney New South Wales Australia
14. Emergency DepartmentSir Charles Gairdner Hospital Perth Western Australia Australia