Environmental triggers of COPD symptoms: a case cross-over study | BMJ Open Respiratory Research

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Chronic obstructive pulmonary disease

Environmental triggers of COPD symptoms: a case cross-over study

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Cite this article as:: Sama SR, Kriebel D, Gore RJ, et al

Environmental triggers of COPD symptoms: a case cross-over study

BMJ Open Respiratory Research 2017;4:e000179. doi: 10.1136/bmjresp-2017-000179