By Renvall Marian J.   Friedman Paul   Ramsdell Joe W.   in COPD: Journal of Chronic Obstructive Pulmonary Disease

ISSN:1541-2555|6|6|432-436

Informa Healthcare‎(2009)‎

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ISSN:1473-4877|22|4|721-730

Informa Healthcare‎(2006)‎

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