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The problem is, every human smoker does not have the same smoking habits as the smoking machines used for the test

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Overall, these participants were more likely to correctly recall claims (68%, 95% CI = 64% to 72%) than disclaimers (57%, 95% CI = 53% to 61%

the BPRF is a conservative risk function defined as the 5th quantile curve (for harmful risks) that reflects the smallest harmful effect at each level of exposure consistent with the available evidence

The American Lung Association, founded in 1904 as the National Association for the Study and Prevention of Tuberculosis and renamed the National Tuberculosis Association in 1918, acquired its present name in 1973 to better reflect efforts to fight a variety of threats to lung health, according to its website