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. 2020 Jul 23;22(7):e17032. doi: 10.2196/17032

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©Yu-Pin Chen, Chung-Ying Lin, Ming-Jr Tsai, Tai-Yuan Chuang, Oscar Kuang-Sheng Lee. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 23.07.2020.

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 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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Angular measurement of the shoulder with motion sensors worn on the body for (A) calibration, (B) shoulder abduction, (C) shoulder flexion, (D) shoulder extension, (E) shoulder external rotation, (F) shoulder internal rotation.