EPIDEMIOLOGY SECTIONBr Med J 1941; 1 doi: https://doi.org/10.1136/bmj.1.4181.302-a (Published 22 February 1941) Cite this as: Br Med J 1941;1:302
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