Risk stratification for open heart surgery.BMJ 1993; 306 doi: http://dx.doi.org/10.1136/bmj.306.6874.394-b (Published 06 February 1993) Cite this as: BMJ 1993;306:394
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