. 2019 Aug 27;21(8):e12967. doi: 10.2196/12967
©Bhone Myint Kyaw, Pawel Posadzki, Sophie Paddock, Josip Car, James Campbell, Lorainne Tudor Car. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 27.08.2019.
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Figure 2.
Risk of bias summary: review authors’ judgements about each risk of bias item for each included study.