Published on in Vol 22 , No 5 (2020) :May
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/16875, first published
.

1 Center for Technology and Behavioral Health, Geisel School of Medicine, Dartmouth College, Lebanon, NH, United States
2 Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States