England and WalesBr Med J 1919; 2 doi: http://dx.doi.org/10.1136/bmj.2.3068.507 (Published 18 October 1919) Cite this as: Br Med J 1919;2:507
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