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2. Economic burden prior to COPD diagnosis: a matched case-control study in the United States. Akazawa M, Halpern R, Riedel AA, Stanford RH, Dalal A, Blanchette CM. Respir Med; 2008 Dec; 102(12):1744-52. PubMed ID: 18760581 [Abstract] [Full Text] [Related]
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