. 2020 Jul 30;22(7):e18839. doi: 10.2196/18839
©Debaleena Chattopadhyay, Tengteng Ma, Hasti Sharifi, Pamela Martyn-Nemeth. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 30.07.2020.
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Figure 6.
Risk of bias presented as percentages across all 26 studies included in the meta-analysis.