. 2019 Dec 13;7(12):e13229. doi: 10.2196/13229
©Xiaorong Guo, Xiang Gu, Jiang Jiang, Hongxiao Li, Ruoyu Duan, Yi Zhang, Lei Sun, Zhengyu Bao, Jianhua Shen, Fukun Chen. Originally published in JMIR mHealth and uHealth (http://mhealth.jmir.org), 13.12.2019.
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Figure 2.
Smart health tracking devices. ECG: electrocardiogram.