Published on in Vol 23, No 4 (2021): April
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/22042, first published
.
![Leveraging Social Media Activity and Machine Learning for HIV and Substance Abuse Risk Assessment: Development and Validation Study Leveraging Social Media Activity and Machine Learning for HIV and Substance Abuse Risk Assessment: Development and Validation Study](https://asset.jmir.pub/assets/a44c8498931f70752c6ea283cdd32ab8.png 480w,https://asset.jmir.pub/assets/a44c8498931f70752c6ea283cdd32ab8.png 960w,https://asset.jmir.pub/assets/a44c8498931f70752c6ea283cdd32ab8.png 1920w,https://asset.jmir.pub/assets/a44c8498931f70752c6ea283cdd32ab8.png 2500w)
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