Smoking is the primary risk factor for the development of COPD, and although the majority of cases of COPD occur in individuals who have smoked, the majority of smokers (approximately 80%) will not have this disorder
Smoking is the primary risk factor for the developmentof COPD, and although the majority of cases ofCOPD occur in individuals who have smoked, the majorityof smokers (approximately 80%) will not have thisdisorder