. 2019 Aug 23;21(8):e12811. doi: 10.2196/12811
©Camille J Hochheimer, Roy T Sabo, Robert A Perera, Nitai Mukhopadhyay, Alex H Krist. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 23.08.2019.
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Figure 1.
Simulated attrition patterns.