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Studies over the past few decades have showed a clear association between cigarette smoking and the development of chronic airway obstruction. Yet, only a minority of smokers is affected so that in many, even heavy, smokers, pulmonary function remains within normal limits. While carcinogens have been well characterized, there is only limited information about the constituents of cigarette smoke responsible...
We aim to assess whether respiratory symptoms are associated with lung function in young adults, and whether any such relation is similar in those with asthma, in men and women, and in different countries. Study participants (aged 20–44 years) were randomly selected from the general population in 35 centres in 15 countries as part of the European Community Respiratory Health Study. In all, 12,541...
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