Published on in Vol 4, No 7 (2020): July
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/19485, first published
.
![A Web-Based Intervention to Prevent Multiple Chronic Disease Risk Factors Among Adolescents: Co-Design and User Testing of the Health4Life School-Based Program A Web-Based Intervention to Prevent Multiple Chronic Disease Risk Factors Among Adolescents: Co-Design and User Testing of the Health4Life School-Based Program](https://asset.jmir.pub/assets/720094186ab2d1c3f452fdad81740dc5.png 480w,https://asset.jmir.pub/assets/720094186ab2d1c3f452fdad81740dc5.png 960w,https://asset.jmir.pub/assets/720094186ab2d1c3f452fdad81740dc5.png 1920w,https://asset.jmir.pub/assets/720094186ab2d1c3f452fdad81740dc5.png 2500w)
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