Published on in Vol 22, No 4 (2020): April
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/15532, first published
.
1 Mission Gastroenterology and Hepatology, San Francisco, CA, United States
2 Proteus Digital Health, Redwood City, CA, United States
3 Paul G Allen School of Computer Science and Engineering, University of Washington, Seattle, WA, United States