Published on in Vol 8, No 8 (2019): August
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/13151, first published
.
1 Division of General Internal Medicine, University of California San Francisco, San Francisco, CA, United States
2 UCSF Center for Vulnerable Populations, University of California San Francisco, San Francisco, CA, United States