Published on in Vol 9, No 8 (2020): August
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/16697, first published
.
1 Frederick S. Pardee School of Global Studies, Boston University, Boston, MA, United States
2 Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Harvard University, Boston, MA, United States