| http://www.w3.org/ns/prov#value | - There have been several reports30???34 showing that respiratory symptoms such as chronic cough and chronic phlegm are associated with a more rapid decline in FEV1, but there are currently no reports of any association between respiratory symptoms and incident COPD. However, the clinical implication of our study is that the early identification of COPD is possible by performing repeated PFTs among
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