Letters, Notes, and AnswersBr Med J 1922; 1 doi: https://doi.org/10.1136/bmj.1.3196.545 (Published 01 April 1922) Cite this as: Br Med J 1922;1:545
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