Published on in Vol 22, No 6 (2020): June
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/16506, first published
.
1 Department of Computer Science, University of Virginia, Charlottesville, VA, United States
2 Department of Public Health Sciences, University of Virginia, Charlottesville, VA, United States
3 University of California, Irvine, CA, United States