Published on in Vol 8 , No 10 (2020) :October
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/18915, first published
.

1 Department of Family Medicine & Public Health, University of California, San Diego, San Diego, CA, US
2 Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Diego, San Diego, CA, US