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Cindys not quite sure what shes going to do with them

The National Cancer Institute defines a pack-year as a way to measure smoking history by multiplying packs smoked per day by years smoked

The CDC released the data from its survey last fall, but without the analysis that usually accompanies it and gets published in its Morbidity and Mortality Weekly Report

Championed by many celebrities, there have now been several clinical studies that confirm the effectiveness of Carr's method [1] including two randomised controlled trials

If the lifetime risk of cancer was 20% in one group and 80% in the other, we could describe that difference in terms of percentage points