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Seeing as tobacco is sold by weight, that's gotta be a business consideration too

Archived from the original on May 5, 2016

During ad lib use, subjects assigned to an e-cigarette or tobacco cigarette product were allowed to use the product as desired for the entire hour (use of the assigned e-cigarette products in an unrestricted manner or smoking as many tobacco cigarettes as they chose) and subjects were responsible for maintaining their own puff counts

Regular cigarette smokers were able to cover a longer distance in six minutes, while menthol smokers were more short of breath

Martin was alive then, but did not participate