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Standardizing measurement of chronic obstructive pulmonary disease exacerbations. Reliability and validity of a

Nancy K Leidy1, Teresa K Wilcox, Paul W Jones

  • 1Center for Health Outcomes Research, Bethesda, MD 20814, USA. Nancy.Leidy@unitedbiosource.com

American Journal of Respiratory and Critical Care Medicine
|September 4, 2010
PubMed
Abstract

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