[1] St John God Murdoch Hosp, Emergency Dept, Murdoch, WA 6150, Australia
[2] Univ Notre Dame Australia, Sch Med, Fremantle, WA, Australia
[3] St John God Murdoch Hosp, Ctr Nursing & Midwifery Res, Murdoch, WA 6150, Australia
[4] Univ Notre Dame Australia, Sch Nursing & Midwifery, Fremantle, WA, Australia
[5] Edith Cowan Univ, Sch Nursing & Midwifery, Joondalup, WA, Australia