[This corrects the article DOI: 10.2196/mhealth.8123.].
©Emily J Harvey, Leslie F Rubin, Sabrina L Smiley, Yitong Zhou, Hoda Elmasry, Jennifer L Pearson. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 19.03.2018.