Intended for healthcare professionals

Articles

Epidemiology Section

Br Med J 1948; 1 doi: https://doi.org/10.1136/bmj.1.4551.623 (Published 27 March 1948) Cite this as: Br Med J 1948;1:623
PDF extract preview

This is a PDF-only article. The first page of the PDF of this article appears above.

Log in

Log in through your institution

Subscribe

* For online subscription