Research Article
ABC of 1 to 7. Respiratory tract infection.
Br Med J (Clin Res Ed) 1981; 283 doi: https://doi.org/10.1136/bmj.283.6283.38 (Published 04 July 1981) Cite this as: Br Med J (Clin Res Ed) 1981;283:38This is a PDF-only article. The first page of the PDF of this article appears above.