Published on in Vol 7, No 6 (2021): June
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/27917, first published
.
1 Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, United States
2 Department of International Health, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, United States