Susan Wakil School of Nursing and Midwifery, Faculty of Medicine and Health, University of Sydney, Australia; School of Nursing, Faculty of Science, Medicine and Health, University of Wollongong, Australia; Illawarra Health and Medical Research Institute, University of Wollongong, Australia; Emergency Department, Wollongong Hospital, Illawarra Shoalhaven Local Health District, Australia; Department of Obstetrics and Gynaecology, Illawarra Shoalhaven Local Health District, Wollongong, Australia. Electronic address: baylie@uow.edu.au. Susan Wakil School of Nursing and Midwifery, Faculty of Medicine and Health, University of Sydney, Australia; Emergency Department, Wollongong Hospital, Illawarra Shoalhaven Local Health District, Australia. Susan Wakil School of Nursing and Midwifery, Faculty of Medicine and Health, University of Sydney, Australia. Emergency Department, Wollongong Hospital, Illawarra Shoalhaven Local Health District, Australia. Susan Wakil School of Nursing and Midwifery, Faculty of Medicine and Health, University of Sydney, Australia; Illawarra Health and Medical Research Institute, University of Wollongong, Australia; Emergency Services, Critical Care Division, Illawarra Shoalhaven Local Health District, Australia. Department of Obstetrics and Gynaecology, Illawarra Shoalhaven Local Health District, Wollongong, Australia. Susan Wakil School of Nursing and Midwifery, Faculty of Medicine and Health, University of Sydney, Australia; Molly Wardaguga Research Centre, CDU, Darwin, Australia.