. 2019 Jan 8;7(1):e202. doi: 10.2196/mhealth.9931
©Daihua Yu, Bambang Parmanto, Brad Dicianno. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 08.01.2019.
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Figure 2.
Four elements of the user interface.