. 2018 Oct 25;5(4):e11640. doi: 10.2196/11640
©Melvyn Zhang, Jiangbo Ying, Guo Song, Daniel SS Fung, Helen Smith. Originally published in JMIR Mental Health (http://mental.jmir.org), 25.10.2018.
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Figure 1.
Flowchart of the selection of studies.