Published on in Vol 22, No 10 (2020): October
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/16255, first published
.
1 Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
2 Ontario Tobacco Research Unit, Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
3 Office of Education, Centre for Addiction and Mental Health, Toronto, ON, Canada