Published on in Vol 8, No 12 (2022): December
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/38158, first published
.
![Machine Learning Techniques to Explore Clinical Presentations of COVID-19 Severity and to Test the Association With Unhealthy Opioid Use: Retrospective Cross-sectional Cohort Study Machine Learning Techniques to Explore Clinical Presentations of COVID-19 Severity and to Test the Association With Unhealthy Opioid Use: Retrospective Cross-sectional Cohort Study](https://asset.jmir.pub/assets/c73c0485df7ce76035ae3a26b45e5854.png 480w,https://asset.jmir.pub/assets/c73c0485df7ce76035ae3a26b45e5854.png 960w,https://asset.jmir.pub/assets/c73c0485df7ce76035ae3a26b45e5854.png 1920w,https://asset.jmir.pub/assets/c73c0485df7ce76035ae3a26b45e5854.png 2500w)
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