. 2013 Sep 9;1(2):e22. doi: 10.2196/mhealth.2641
©Yu-Mei Schoenberger, Janice Phillips, Mohammed Omar Mohiuddin, Patrick McNees, Isabel Scarinci. Originally published in JMIR mHealth and uHealth (http://mhealth.jmir.org), 09.09.2013.
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Figure 1.
Smartphone ownership and SMS usage among participants owning a mobile phone.