Research Article
Should bronchodilators be combined in chronic bronchitis and emphysema?
Br Med J (Clin Res Ed) 1987; 295 doi: https://doi.org/10.1136/bmj.295.6607.1160-a (Published 07 November 1987) Cite this as: Br Med J (Clin Res Ed) 1987;295:1160
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