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The validity of using ICD-9 codes and pharmacy records to identify patients with chronic obstructive pulmonary disease

By Colin R Cooke, Min J Joo, Stephen M Anderson, Todd A Lee, Edmunds M Udris, Eric Johnson and David H Au
Publisher: Springer Nature
Year: 2011
DOI identifier: 10.1186/1472-6963-11-37
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Provided by: MUCC (Crossref)
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