[1] Telethon Kids Inst, Perioperat Med Team, Nedlands, WA, Australia
[2] Perth Childrens Hosp, Dept Anesthesia & Pain Management, Nedlands, WA, Australia
[3] Univ Western Australia, Inst Paediat Perioperat Excellence, Perth, WA, Australia
[4] Univ Western Australia, Med Sch, Div Emergency Med Anesthesia & Pain Med, Perth, WA, Australia
[5] Univ Western Australia, Sch Allied Hlth, Discipline Pharm, Perth, WA, Australia
[6] Univ Western Australia, Sch Phys Math & Comp, Perth, WA, Australia
[7] Univ Western Australia, Sch Math & Stat, Perth, WA, Australia