Published on in Vol 23, No 4 (2021): April
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/25379, first published
.
1 Information Sciences Institute, University of Southern California, Los Angeles, CA, United States
2 Department of Computer Science, University of Southern California, Los Angeles, CA, United States
3 Annenberg School for Communication and Journalism, University of Southern California, Los Angeles, CA, United States