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. 2019 Oct 15;7(10):e13479. doi: 10.2196/13479

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©Youri PMJ Derks, Randy Klaassen, Gerben J Westerhof, Ernst T Bohlmeijer, Matthijs L Noordzij. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 15.10.2019.

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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Sense-IT watch faces, first version. The watch faces each expressed changing levels of HR/PCEA by changing either the circular elements (ie, more circles or a bigger circle), or simply indicating a numerical level (from 1 – 10).