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(opens a new window to the external site)Published on in Vol 22, No 7 (2020): July
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/17338, first published
.
1 Health Union, LLC, Philadelphia, PA, United States
2 Department of Health Behavior, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
*all authors contributed equally