Published on in Vol 13, No 3 (2021): Jul-Dec
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/30062, first published
.
1 Department of Human Biology, Stanford University, Stanford, CA, United States
2 Department of Epidemiology and Population Health, School of Medicine, Stanford University, Stanford, CA, United States