[1] Centre for Health Services Research, The University of Queensland, Herston, QLD
[2] School of Medicine, The University of Queensland, Herston, QLD
[3] Queensland Children's Hospital, Brisbane, QLD
[4] Princess Alexandra Hospital, Brisbane, QLD
[5] Cancer and Palliative Care Outcomes Centre at Centre for Children's Health Research, Queensland University of Technology, Brisbane, QLD
[6] Dalla Lana School of Public Health, The University of Toronto, Toronto, ON