Published on in Vol 9, No 5 (2021): May
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/21177, first published
.
![Developing Messaging Content for a Physical Activity Smartphone App Tailored to Low-Income Patients: User-Centered Design and Crowdsourcing Approach Developing Messaging Content for a Physical Activity Smartphone App Tailored to Low-Income Patients: User-Centered Design and Crowdsourcing Approach](https://asset.jmir.pub/assets/66b5226dfe0023f0303d70d586ccd5f1.png 480w,https://asset.jmir.pub/assets/66b5226dfe0023f0303d70d586ccd5f1.png 960w,https://asset.jmir.pub/assets/66b5226dfe0023f0303d70d586ccd5f1.png 1920w,https://asset.jmir.pub/assets/66b5226dfe0023f0303d70d586ccd5f1.png 2500w)
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