Published on in Vol 22, No 6 (2020): June
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/17554, first published
.
1 Paul Merage School of Business, University of California, Irvine, Irvine, CA, United States
2 Stanford Prevention Research Center, Department of Medicine, Stanford University, Stanford, CA, United States