Letter
ABC of 1 to 7: whooping cough.
Br Med J (Clin Res Ed) 1982; 284 doi: https://doi.org/10.1136/bmj.284.6324.1263-b (Published 24 April 1982) Cite this as: Br Med J (Clin Res Ed) 1982;284:1263Article usage
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