Funding for this research was provided by:
National Health and Medical Research Council (1007878)
Bellberry Ltd (PhD scholarship)
Received: 3 June 2018
Accepted: 19 March 2019
First Online: 2 April 2019
Ethics approval and consent to participate
: This study was approved by the Western Australian Aboriginal Health Ethics Committee (Ref 306–08/10) and the Western Australian Department of Health Ethics Research Committee (Ref 2010/42). The requirement for consent to participate was waived by the ethics committees as obtaining consent was impracticable for this study. Approval to access the datasets used in this study was granted by the Western Australian Department of Health Ethics Research Committee and data custodians.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.