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. 2016 Nov 17;18(11):e292. doi: 10.2196/jmir.6371

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©Ju Young Kim, Nathan E Wineinger, Michael Taitel, Jennifer M Radin, Osayi Akinbosoye, Jenny Jiang, Nima Nikzad, Gregory Orr, Eric Topol, Steve Steinhubl. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 17.11.2016.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.jmir.org/, as well as this copyright and license information must be included.

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Percentage of users still logging activities after certain number of weeks, and the average number of activities logged during that week. Bar: users remaining, line: activities logged per week.