Published on in Vol 5, No 12 (2021): December
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/33331, first published
.
![Campus Smoking Policies and Smoking-Related Twitter Posts Originating From California Public Universities: Retrospective Study Campus Smoking Policies and Smoking-Related Twitter Posts Originating From California Public Universities: Retrospective Study](https://asset.jmir.pub/assets/fe0a2312f7c34aec4c7a62cd91792e35.png 480w,https://asset.jmir.pub/assets/fe0a2312f7c34aec4c7a62cd91792e35.png 960w,https://asset.jmir.pub/assets/fe0a2312f7c34aec4c7a62cd91792e35.png 1920w,https://asset.jmir.pub/assets/fe0a2312f7c34aec4c7a62cd91792e35.png 2500w)
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