[1] Univ Sydney, Fac Med & Hlth, Susan Wakil Sch Nursing & Midwifery, MO2 88 Mallett St, Sydney, NSW 2006, Australia
[2] Macquarie Univ, Fac Med Hlth & Human Sci, Australian Inst Hlth Innovat, 75 Talavera Rd, N Ryde, NSW 2113, Australia
[3] Univ Sydney, Fac Med & Hlth, Sci Rd, Camperdown, NSW 2006, Australia
[4] NSW Ambulance, Greater Sydney Area HEMS, 33 Nancy Ellis Leebold Dr, Bankstown Airport, NSW 2200, Australia
[5] NSW Ambulance, Locked Bag 105, Rozelle, NSW 2039, Australia
[6] Agcy Clin Innovat, NSW Inst Trauma & Injury Management ITIM, Level 4,67 Albert Ave, Chatswood, NSW 2067, Australia
[7] Childrens Hosp Westmead, Locked Bag 4001, Westmead, NSW 2145, Australia