Text and Data Mining valid from 2020-02-04
Received: 20 September 2019
Accepted: 20 January 2020
First Online: 4 February 2020
Ethics approval and consent to participate
: This study was approved by the Human Research Committee at the University of Sydney (project number: 2016/022). All participants provided written consent (see Additional file InternalRef removed).
: Not applicable.
: The authors declare that they have no competing interests.