. 2010 Dec 14;12(4):e69. doi: 10.2196/jmir.1640
©Melinda J Neve, Clare E Collins, Philip J Morgan. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 14.12.2010
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Figure 5.
Dropout and nonusage attrition from enrollment to 52 weeks among 52 week subscribers