Published on in Vol 8, No 5 (2021): May
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/23688, first published
.
1 Stanford Prevention Research Center, Department of Medicine, Stanford University, Stanford, CA, United States
2 Hopelab, San Francisco, CA, United States
3 Department of Psychiatry and Behavioral Sciences, University of California, San Francisco, CA, United States