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Correction: Optimizing Text Messages to Promote Engagement With Internet Smoking Cessation Treatment: Results From a Factorial Screening Experiment

Correction: Optimizing Text Messages to Promote Engagement With Internet Smoking Cessation Treatment: Results From a Factorial Screening Experiment

The following corrections have been implemented: The symbols μ and φ were presented as m and f, respectively, in the following sentence of the Methods section; additionally, in this section, the negative sign was incorrectly subscripted: SMDs for frequency counts were calculated as (m1−m2)/[f(m1+m2)]1/2, where m1 and m2 were the sample means of each comparison group.

Amanda L L Graham, George D Papandonatos, Megan A Jacobs, Michael S Amato, Sarah Cha, Amy M Cohn, Lorien C Abroms, Robyn Whittaker

J Med Internet Res 2020;22(7):e21027