. 2017 Jun 23;19(6):e227. doi: 10.2196/jmir.7045
©Heidi Holmen, Astrid Klopstad Wahl, Milada Cvancarova Småstuen, Lis Ribu. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 23.06.2017.
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Figure 3.
Risk of bias summary: review authors’ judgments about each risk of bias item for each included study.