Compliance with ethical standards
Funding: This study was funded by the Medical Research Future Fund provided by the Melbourne Academic Centre for Health.
Conflict of interest : The authors declare that they have no competing interests.
Ethical approval: The study was approved by the Melbourne Health Human Research Ethics Committee (HREC/17/MH/103) and performed in accordance with the principles of the Declaration of Helsinki.
Informed consent: All participants (or their nominated proxy) provided their written informed consent to participate in this study.
Data availability : The RESORT data that support the findings of this study are available from ABM (fifth author) upon reasonable request.