Any Questions?Br Med J 1959; 2 doi: https://doi.org/10.1136/bmj.2.5140.51-a (Published 11 July 1959) Cite this as: Br Med J 1959;2:51
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