Validity and underrecording of diagnosis of COPD in the Danish National Patient Registry

Reimar W. Thomsen, Peter Lange, Birthe Hellquist, Ejvind Frausing Hansen, Paul Bartels, Birgitte Randrup Krog, Anne-Marie S. Hansen, Daniel Buck, Anette Ehlers Bunk

Respiratory Medicine · 2011 · 158 citations · 16 references

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