. 2015 Jun 11;4(2):e72. doi: 10.2196/resprot.4463
©Milisa Manojlovich, Julia Adler-Milstein, Molly Harrod, Anne Sales, Timothy P Hofer, Sanjay Saint, Sarah L Krein. Originally published in JMIR Research Protocols (http://www.researchprotocols.org), 11.06.2015.
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Figure 2.
Sampling plan for aim 2.