. 2009 Feb 6;11(1):e3. doi: 10.2196/jmir.1106
© Robert C Wu, Kevin Thorpe, Heather Ross, Vaska Micevski, Christine Marquez, Sharon E Straus. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 06.02.2009.
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Figure 1.
Flow of study participants