. 2019 Mar 5;7(3):e11437. doi: 10.2196/11437
©Yong-Yan Fan, Yan-Guang Li, Jian Li, Wen-Kun Cheng, Zhao-Liang Shan, Yu-Tang Wang, Yu-Tao Guo. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 05.03.2019.
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