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. 2016 Apr 27;4(2):e40. doi: 10.2196/mhealth.4461

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©Kathryn Mercer, Melissa Li, Lora Giangregorio, Catherine Burns, Kelly Grindrod. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 27.04.2016.

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 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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Wearable fitness trackers. Top L-R: Jawbone UP24, Nike Fuelband, Polar Loop, Misfit Shine with sport band . Centre: Misfit Shine with action Clip. Bottom L - R: Withings Pulse, Fitbit Zip, Spark Activity Tracker.