Published on in Vol 8, No 1 (2020): January
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/16838, first published
.
1 Center for Public Health Research, San Francisco Department of Public Health, San Francisco, CA, United States
2 Departments of Psychiatry and Pediatrics, University of California, San Francisco, San Francisco, CA, United States
*these authors contributed equally