Text and Data Mining valid from 2019-10-16
Received: 24 September 2018
Accepted: 20 September 2019
First Online: 16 October 2019
Ethics approval and consent to participate
: Details on ethics approvals are provided in the main body of the Methods section of the manuscript. Ethics approvals were obtained from the South Western Sydney Local Health District and Sydney Local Health District Ethics Committees to conduct data linkage providing data used remained anonymous. (Approval numbers HREC: LNR/11/LPOOL/463; SSA: LNRSSA/11/LPOOL/464 & Project No: 11/276 LNR; Protocol No X17–0454 & LNR/12/RPAH/266).
: Not applicable. No information on an individual person is presented in the current study.
: The authors declare that they have no competing interests.