. 2018 Jun 18;20(6):e223. doi: 10.2196/jmir.9812
©Chiara Marzorati, Chiara Renzi, Samuel William Russell-Edu, Gabriella Pravettoni. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 18.06.2018.
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Figure 4.
Intervention formats.