Published on in Vol 9, No 1 (2022): January
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/33114, first published
.
![Problematic Internet Use Before and During the COVID-19 Pandemic in Youth in Outpatient Mental Health Treatment: App-Based Ecological Momentary Assessment Study Problematic Internet Use Before and During the COVID-19 Pandemic in Youth in Outpatient Mental Health Treatment: App-Based Ecological Momentary Assessment Study](https://asset.jmir.pub/assets/f1e96530027d6a0de863f78e701c8887.png 480w,https://asset.jmir.pub/assets/f1e96530027d6a0de863f78e701c8887.png 960w,https://asset.jmir.pub/assets/f1e96530027d6a0de863f78e701c8887.png 1920w,https://asset.jmir.pub/assets/f1e96530027d6a0de863f78e701c8887.png 2500w)
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