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As the study participants were aged 18-21, and smokers cough is more prevalent among long-term smokers, it is likely that the true percentage of smokers affected by smokers cough is higher than this

27,28 Cigarette Smoke, Glucose Metabolism Reprogramming and COPD CS exerts complex, multilayered effects on pulmonary metabolism and immune function in both active smokers and those with passive exposure, with such effects potentially varying by age, sex, and mode of exposure, thereby complicating the understanding of smoking-related COPD pathogenesis

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any product that contains any amount of tetrahydrocannabinols (THC), except as set out in 21 CFR 1308.35