. 2017 Dec 8;5(12):e180. doi: 10.2196/mhealth.8624
©Maritta Välimäki, Katriina Anttila, Minna Anttila, Mari Lahti. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 08.12.2017.
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Figure 2.
Risk of bias of studies included in the meta-analysis.