. 2015 Nov 10;17(11):e253. doi: 10.2196/jmir.4836
©Gemma Flores Mateo, Esther Granado-Font, Carmen Ferrer-Grau, Xavier Montaña-Carreras. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 10.11.2015.
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Figure 1.
Flowchart for the selection of the articles in this meta-analysis.