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. 2018 Dec 10;6(12):e10338. doi: 10.2196/10338

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©Ravi Kondama Reddy, Rubin Pooni, Dessi P Zaharieva, Brian Senf, Joseph El Youssef, Eyal Dassau, Francis J Doyle III, Mark A Clements, Michael R Rickels, Susana R Patton, Jessica R Castle, Michael C Riddell, Peter G Jacobs. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 10.12.2018.

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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Spurious heart rate measured by the Garmin and Fitbit devices when placed on a shaker device (image of the experimental setup in the inset). H:M is hours:minutes.