. 2015 Jul 2;17(7):e162. doi: 10.2196/jmir.4141
©Ronny Lehmann, Christiane Thiessen, Barbara Frick, Hans Martin Bosse, Christoph Nikendei, Georg Friedrich Hoffmann, Burkhard Tönshoff, Sören Huwendiek. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 02.07.2015.
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Figure 1.
Study design.