Published on in Vol 9, No 12 (2020): December
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/22368, first published
.
1 The Matilda Centre for Research in Mental Health and Substance Use, The University of Sydney, Sydney, Australia
2 Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, United States