The impact of exacerbation frequency on mortality following acute exacerbations of COPD: a registry-based cohort study | BMJ Open

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The impact of exacerbation frequency on mortality following acute exacerbations of COPD: a registry-based cohort study

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Cite this article as:: Schmidt SAJ, Johansen MB, Olsen M, et al

The impact of exacerbation frequency on mortality following acute exacerbations of COPD: a registry-based cohort study

BMJ Open 2014;4:e006720. doi: 10.1136/bmjopen-2014-006720