Published on in Vol 9, No 12 (2020): December
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/19603, first published
.
![Effects of Unfiltered Cigarettes on Smoking Behavior and Toxicant Exposure: Protocol for a Randomized Crossover Clinical Trial Effects of Unfiltered Cigarettes on Smoking Behavior and Toxicant Exposure: Protocol for a Randomized Crossover Clinical Trial](https://asset.jmir.pub/assets/f6781ac7266845097b4c0d3b2edfe7a1.png 480w,https://asset.jmir.pub/assets/f6781ac7266845097b4c0d3b2edfe7a1.png 960w,https://asset.jmir.pub/assets/f6781ac7266845097b4c0d3b2edfe7a1.png 1920w,https://asset.jmir.pub/assets/f6781ac7266845097b4c0d3b2edfe7a1.png 2500w)
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