Received: 14 January 2018
Accepted: 19 June 2019
First Online: 9 July 2019
Ethics approval and consent to participate
: This research was approved by the Australian Government Department of Human Services External Requests Evaluation Committee—Request approval number MI5157. Since the research was undertaken on existing medicines data with no personal identifiers, ethics approval was not required.
: Not applicable.
: The authors declare that they have no competing interests.