. 2017 Dec 19;19(12):e420. doi: 10.2196/jmir.9046
©Carissa A Low, Anind K Dey, Denzil Ferreira, Thomas Kamarck, Weijing Sun, Sangwon Bae, Afsaneh Doryab. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 19.12.2017.
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Figure 1.
Data collection and analyses methods. (GPS: global positioning system).