[1] Univ Western Australia, WA Ctr Rural Hlth, Geraldton, WA 6531, Australia
[2] Univ South Australia, Div Hlth Sci, Ctr Populat Hlth Res, Adelaide, SA, Australia
[3] Curtin Univ, Sch Physiotherapy & Exercise Sci, Perth, WA, Australia
[4] Body Log Physiotherapy, Shenton Pk, WA, Australia
[5] Harry Perkins Inst Med Res, Ctr Clin Res Emergency Med, Perth, WA, Australia
[6] Fiona Stanley Hosp, Emergency Dept, Murdoch, WA, Australia
[7] Curtin Univ, Sch Physiotherapy, Bentley, WA, Australia
[8] Curtin Univ, Curtin Hlth Innovat Res Inst, Bentley, WA, Australia
[9] Univ Sydney, Sch Publ Hlth, Sydney, NSW, Australia