Funding for this research was provided by:
NSW Ministry of Health (Application 206)
Received: 11 December 2019
Accepted: 13 January 2020
First Online: 28 January 2020
Change Date: 19 February 2020
Change Type: Correction
Change Details: It was highlighted that in the original article  author Amanda Baker was erroneously omitted from the authorship during the copy editing stage.
Ethics approval and consent to participate
: The University of Wollongong Human Research Ethics Committee (HE 2018/156) has reviewed and approved the research trial. Written informed consent will be obtained from all recruited participants.
: Not applicable.
: GB is employed by The Salvation Army. JL is employed by WHOS. PK and FD have both held research consultancies with The Salvation Army and WHOS. The other authors declare that they have no competing interests.