. 2018 Sep 14;20(9):e10244. doi: 10.2196/10244
©Yuki Lama, Tao Chen, Mark Dredze, Amelia Jamison, Sandra Crouse Quinn, David A Broniatowski. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 14.09.2018.
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Figure 3.
Distribution of sources.