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Orla: Add up how many cigarettes you smoke a day

A study found that some brands of cigarettes deliver a much more powerful nicotine kick'' than others, adding to suspicions that manufacturers deliberately blend tobacco to boost the addictive effect

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Some other studies focus on the variations of genes within the context of tobacco smoking and detected the associations between smoke exposure and CTFR dysfunction [117, 118], which could in turn lead to deleterious effects on airway surface liquid secretion, enhanced mucus expression, reduced mucociliary clearance, chronic bacterial infection, and excess inflammation [119], rendering the main morbidity and mortality in CF patients because of the fact that lung inflammation and chronic respiratory infections alone account for nearly 95% of the morbidity and mortality in patients with CF [120]