Medicine by RadioBr Med J 1950; 2 doi: https://doi.org/10.1136/bmj.2.4687.1060-b (Published 04 November 1950) Cite this as: Br Med J 1950;2:1060
Log in using your username and password
Log in through your institution
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