In one of the first studies to examine the trajectory of electronic cigarette use over time, Lechner and colleagues have shown that extended duration of electronic cigarette use is associated with

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It is important to point out that just because the relative risk of cancer associated with filtered cigarettes is lower than that for non-filtered cigarettes, it does not necessarily follow that switching from a non-filtered to a filtered cigarette will reduce one's health risks. It is possible that smokers who make such a switch will compensate because they are used to higher tar levels. It is possible that the observed reduction in cancer risk only holds for lifelong filtered cigarette smokers, as they do not compensate (they never smoked non-filtered cigarettes). In fact, the scientific evidence supports this contention.

The Campaign for Tobacco-Free Kids argued that the tobacco companies and retailers not be allowed to tell consumers that the renamed products are the same as the former products. But this would have been an unconstitutional restriction of free speech. Unless the renamed product is banned, or the descriptor used is in violation of the law because it directly infers that the cigarette is safer, then I'm afraid that the companies are in compliance with the law and the anti-smoking groups are going to have to respect that.

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