Published on in Vol 9, No 1 (2020): Jan-Mar
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/13029, 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, Chapel Hill, NC, United States
*all authors contributed equally