British Medical JournalBr Med J 1930; 1 doi: https://doi.org/10.1136/bmj.1.3623.1102 (Published 14 June 1930) Cite this as: Br Med J 1930;1:1102
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