Published on in Vol 21, No 11 (2019): November
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/16359, first published
.
1 Department of Biomedical Informatics, Columbia University, New York, NY, United States
2 Department of Sociomedical Sciences, Columbia University, New York, NY, United States