. 2021 Jun 11;9(6):e26095. doi: 10.2196/26095
©Mingrong Chen, Tingting Wu, Meina Lv, Chunmei Chen, Zongwei Fang, Zhiwei Zeng, Jiafen Qian, Shaojun Jiang, Wenjun Chen, Jinhua Zhang. Originally published in JMIR mHealth and uHealth (https://mhealth.jmir.org), 11.06.2021.
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Figure 2.
Risk assessment of bias in the included studies.