Published on in Vol 22, No 7 (2020): July
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/15873, first published
.
1 Department of Computer Science, University of Copenhagen, Copenhagen, Denmark
2 Department of Public Health, University of Copenhagen, Copenhagen, Denmark
3 Department of Communication, University of Copenhagen, Copenhagen, Denmark
*all authors contributed equally