| http://www.w3.org/ns/prov#value | - umber of diseases (chronic bronchitis, emphysema and chronic asthma) (Russell et al, 2011).Smoking is a major associated causal factor in COPD (Russell et al, 2011) but factors such as socioeconomic class and environment, as well as host factors, such as alpha-1 antitrypsin deficiency and airwayhyperresponsiveness, all have a role in the disease (Russell et al, 2011).Owing to its chronic nature, t
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