Published on in Vol 7 , No 5 (2018) :May
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/9899, first published
.

1 Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison, Madison, WI, US
2 Brown University, Providence, RI, US
3 Department of Psychiatry, University of Michigan–Ann Arbor, Ann Arbor, MI, US