Fox writes: "The tobacco control community should strive for transparency in its dealings. If the tobacco control community fails to explain its dealings within an appropriate framework, it may be perceived as biased or hiding relationships, and it could lose its reputation for independence."

Instead, I think that studies which specifically compare lung cancer risk between lifelong smokers of filtered vs. non-filtered cigarettes during the same time period are most informative regarding the relative cancer risks of these products. And multiple studies along these lines, including recent studies, have reported a slightly decreased risk associated with lifetime smoking of filtered vs. non-filtered cigarettes.

The authors write: "Consistent with the only other longitudinal population-level study with 1-year follow-up that we are aware of, we found that e-cigarette use by smokers was not followed by greater rates of quitting or by reduction in cigarette consumption 1 year later."

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