. 2017 Jun 22;19(6):e221. doi: 10.2196/jmir.7405
©Laura Kooij, Wim G Groen, Wim H van Harten. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 22.06.2017.
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Figure 1.
Flowchart of the search and selection procedure.