Articles

The British Medical Association

Br Med J 1939; 2 doi: http://dx.doi.org/10.1136/bmj.2.4104.548 (Published 02 September 1939) Cite this as: Br Med J 1939;2:548

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

Free trial

Register for a free trial to thebmj.com to receive unlimited access to all content on thebmj.com for 14 days.
Sign up for a free trial

Subscribe