. 2021 Feb 17;5(2):e14760. doi: 10.2196/14760
©Hyunggu Jung, George Demiris, Peter Tarczy-Hornoch, Mark Zachry. Originally published in JMIR Formative Research (http://formative.jmir.org), 17.02.2021.
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Figure 1.
Screenshots of the user interface in the smartphone app.