. 2017 Feb 13;19(2):e28. doi: 10.2196/jmir.6382
©Michelle M Alvarado, Hye-Chung Kum, Karla Gonzalez Coronado, Margaret J Foster, Pearl Ortega, Mark A Lawley. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 13.02.2017.
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Figure 2.
Technology used by popularity.