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. 2018 Apr 12;6(4):e87. doi: 10.2196/mhealth.9187

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©Nicole Chiang, Michael Guo, K Rivet Amico, Lou Atkins, Richard T Lester. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 12.04.2018.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR mhealth and uhealth, is properly cited. The complete bibliographic information, a link to the original publication on http://mhealth.jmir.org/, as well as this copyright and license information must be included.

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Capability Opportunity Motivation - Behavior (COM-B) model of behavior (image spelling has been modified, based on Michie S et al [18]).