Standardizing Measurement of Chronic Obstructive Pulmonary Disease Exacerbations: Reliability and Validity of a Patient-reported Diary

Nancy Kline Leidy(Ithaka Harbors), Sanjay Sethi(Buffalo State University), Paul Jones(St George's, University of London), John H. Powers(Leidos (United States)), Teresa K. Wilcox, Laurie Roberts
American Journal of Respiratory and Critical Care Medicine
September 2, 2010
10.1164/rccm.201005-0762oc
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