Published on in Vol 9, No 7 (2020): July
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/16543, first published
.
1 The Wallace Center for Maternal, Child, and Adolescent Health, School of Public Health, University of California, Berkeley, Berkeley, CA, United States
2 Department of Electrical Engineering and Computer Sciences, College of Engineering, University of California, Berkeley, Berkeley, CA, United States
*these authors contributed equally