. 2012 Oct 4;14(5):e125. doi: 10.2196/jmir.2102
©Fahad Pervaiz, Mansoor Pervaiz, Nabeel Abdur Rehman, Umar Saif. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 04.10.2012.
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Figure 9.
US Department of Health and Human Services regions.