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Specificity of ICD-9 diagnosis codes for identifying patients hospitalized for COPD

Stein BD, Bautista A, Schumock GT, Lee TA, Meltzer DO, Naureckas ET, Krishnan JA. Specificity of ICD-9 diagnosis codes for identifying patients hospitalized for COPD. Paper presented at: American Thoracic Society Annual International Conference; 2009 May 1; San Diego, CA.

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