Funding for this research was provided by:
NSW Ministry of Health Population Health and Health Services Research Support Program
National Health and Medical Research Council (APP1021025)
Received: 19 April 2017
Accepted: 19 March 2018
First Online: 10 April 2018
Ethics approval and consent to participate
: Ethics approval was obtained from the NSW Population and Health Services Research Ethics Committee (2002/12/430) prior to commencement of this study. A waiver of consent was granted for use of de-identified data.
: 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.