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Pack years is a way to measure a smoker's exposure to tobacco. Higher exposure means higher risk for lung cancer. beaumont.org lung Tobacco Patterns and Risk of Chronic Obstructive Pulmonary Disease: Results From a Cross Sectional Study Archivos de Bronconeumologa Calculating Smoking Pack Years Health BeatHealth Beat Forget 'Pack Years' for Lung Cancer Screening Eligibility, Study Suggests MedPage Today Smoking history and the rate of hearing decline in aging: Results from a longitudinal cohort study ScienceDirect Tobacco, Lung Cancer & Quitting Smoking FAQ cCARE
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