The British Medical AssociationBr Med J 1929; 2 doi: http://dx.doi.org/10.1136/bmj.2.3582.442 (Published 31 August 1929) Cite this as: Br Med J 1929;2:442
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