Published on in Vol 23, No 6 (2021): June
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/24458, first published
.
1 Department of Epidemiology, School of Public Health, University of Washington, Seattle, WA, United States
2 School of Medicine and Public Health, University of Wisconsin, Madison, WI, United States
3 Seattle Children's Hospital, Seattle, WA, United States