[1] Univ Sydney, Fac Med & Hlth, Susan Wakil Sch Nursing & Midwifery, Sydney, NSW, Australia
[2] Illawarra Shoalhaven Local Hlth Dist, Emergency Serv, Wollongong, NSW, Australia
[3] Illawarra Hlth & Med Res Inst, Wollongong, NSW, Australia
[4] George Inst Global Hlth, Injury Div, Sydney, NSW, Australia
[5] Macquarie Univ, Fac Med Hlth & Human Sci, Australian Inst Hlth Innovat, Sydney, NSW, Australia
[6] Univ Sydney, Fac Med & Hlth, Sydney, NSW, Australia
[7] NSW Ambulance, Greater Sydney Area HEMS, Sydney, NSW, Australia
[8] Agcy Clin Innovat, NSW Inst Trauma & Injury Management, Sydney, NSW, Australia
[9] Royal North Shore Hosp, Northern Sydney Local Hlth Dist, Paediat Emergency, Sydney, NSW, Australia
[10] Childrens Hosp Westmead, Dept Surg, Sydney, NSW, Australia