. 2018 Sep 13;6(9):e177. doi: 10.2196/mhealth.9656
©Michelle Crouthamel, Emilia Quattrocchi, Sarah Watts, Sherry Wang, Pamela Berry, Luis Garcia-Gancedo, Valentin Hamy, Rachel E Williams. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 13.09.2018.
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Figure 3.
Geographic distribution of participants within the United States.