. 2013 Jan 14;15(1):e9. doi: 10.2196/jmir.1715
©Johan Creutzfeldt, Leif Hedman, LeRoy Heinrichs, Patricia Youngblood, Li Felländer-Tsai. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 14.01.2013.
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Figure 3.
Design of the study.