Letters, Notes, and AnswersBr Med J 1938; 2 doi: https://doi.org/10.1136/bmj.2.4066.1244 (Published 10 December 1938) Cite this as: Br Med J 1938;2:1244
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