Letters, Notes, and AnswersBr Med J 1938; 1 doi: https://doi.org/10.1136/bmj.1.4025.496 (Published 26 February 1938) Cite this as: Br Med J 1938;1:496
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