. 2017 May 31;19(5):e191. doi: 10.2196/jmir.7381
©Fabian Wahle, Lea Bollhalder, Tobias Kowatsch, Elgar Fleisch. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 31.05.2017.
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Figure 5.
Risk of bias across all included studies (N=45).