Postgraduate HaematologyBr Med J 1974; 3 doi: http://dx.doi.org/10.1136/bmj.3.5933.749 (Published 21 September 1974) Cite this as: Br Med J 1974;3:749
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