. 2018 Apr 27;20(4):e157. doi: 10.2196/jmir.7898
©Damien Clus, Mark Erik Larsen, Christophe Lemey, Sofian Berrouiguet. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 27.04.2018.
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Figure 1.
Flow diagram of study selection. MeSH: medical subject headings.