Published on in Vol 7, No 5 (2018): May
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/10045, first published
.

1 Partners Connected Health, Partners Healthcare, Massachusetts General Hospital, Harvard Medical School, Boston, MA, US
2 Philips Healthcare , Eindhoven , NL
3 Philips Lifeline , Framingham, MA, US
*these authors contributed equally