Published on in Vol 22, No 9 (2020): September
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/19634, first published
.
1 Zipongo, Inc, DBA Foodsmart, San Francisco, CA, United States
2 Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
3 American College of Lifestyle Medicine, Chesterfield, MO, United States