. 2018 Sep 17;6(9):e10799. doi: 10.2196/10799
©Kim Ludwig, Rosie Arthur, Nicholas Sculthorpe, Hollie Fountain, Duncan S Buchan. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 17.09.2018.
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Figure 2.
Risk of bias assessment.