Text and Data Mining valid from 2020-01-27
Received: 21 July 2019
Accepted: 13 January 2020
First Online: 27 January 2020
Ethics approval and consent to participate
: Ethics approval was obtained by the Institutional Health Research Ethics Board at the University of Alberta for secondary data analysis, No. Pro00013379.
: Not applicable.
: The authors declare that they have no competing interests.