. 2008 Nov 4;10(5):e38. doi: 10.2196/jmir.1095
© Thomas K Houston, Joshua S Richman, Midge N Ray, Jeroan J Allison, Gregg H Gilbert, Richard M Shewchuk, Connie L Kohler, Catarina I Kiefe, DPBRN Collaborative Group. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 04.11.2008.
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Figure 2.
Number of unique providers visiting the website per week over 8 months