Validation of chronic obstructive pulmonary disease (COPD) diagnoses in healthcare databases: a systematic review protocol | BMJ Open

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Validation of chronic obstructive pulmonary disease (COPD) diagnoses in healthcare databases: a systematic review protocol

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Cite this article as:: Rimland JM, Abraha I, Luchetta ML, et al

Validation of chronic obstructive pulmonary disease (COPD) diagnoses in healthcare databases: a systematic review protocol

BMJ Open 2016;6:e011777. doi: 10.1136/bmjopen-2016-011777