Published on in Vol 9, No 4 (2021): April
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/21459, first published
.
1 Department of Population Medicine, Harvard Medical School, Boston, MA, United States
2 Harvard Pilgrim Health Care Institute, Boston, MA, United States
3 Department of Statistics, Pennsylvania State University, University Park, PA, United States