ReviewsBr Med J 1925; 2 doi: https://doi.org/10.1136/bmj.2.3369.163 (Published 25 July 1925) Cite this as: Br Med J 1925;2:163
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