Funding for this research was provided by:
South Western Sydney Local Health District (NA)
Received: 24 July 2020
Accepted: 30 September 2020
First Online: 15 October 2020
Ethics approval and consent to participate
: This project was considered by the South Western Sydney Local Health District Human Research Ethics Committee and was determined to meet the requirements of the National Statement on Ethical Conduct in Human Research (2007). Due to the use of routinely collected hospital separation data, the need for individual patient consent was waived (HREC ref.: HE18/169). Australian New Zealand Clinical Trials Registry (ANZCTR) (ref no. ACTRN12618000411246p).
: Consent for publication of the results of this study is implied from HREC permission to commence.
: The authors declare they have no competing or financial interests.