Search for: [Abstract = "ew cases of chronic phlegm \( = \-33.8.\; 95%CI\: \-64.3\; \-3.2\) and slower in remission cases \(= 40.2\; 95%CI\: 5.2\; 75.2\). Tobacco smoking significantly increased the incidence of all studied symptoms but did not affect lung function significantly."]

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