5 cigarettes a day pack years Pack-years is way to measure a smoker's exposure to tobacco. Higher exposure means higher risk for lung cancer. beaumont.org/lung What is a Cigarette Pack
What is a Cigarette Pack Year? CT Lung Scans in Las Vegas Effect of bidi smoking on nasal mucociliary clearance: a comparative study The Journal of Laryngology & Otology Cambridge Core Pack Year Calculator Smoking duration alone provides stronger risk estimates of chronic obstructive pulmonary disease than pack years Thorax
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