Articles

Reviews

Br Med J 1931; 1 doi: https://doi.org/10.1136/bmj.1.3673.938 (Published 30 May 1931) Cite this as: Br Med J 1931;1:938

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

PDF extract preview

Sign in

Log in through your institution

Subscribe