Published on in Vol 22, No 12 (2020): December
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/22727, first published
.
1 RAND Corporation, Health Care Division, Arlington, VA, United States
2 Doctor on Demand, San Francisco, CA, United States
3 Harvard Medical School, Boston, MA, United States