ReviewsBr Med J 1928; 2 doi: https://doi.org/10.1136/bmj.2.3523.54 (Published 14 July 1928) Cite this as: Br Med J 1928;2:54
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