RT Journal Article SR Electronic T1 Blood transfusion JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 423 OP 423 DO 10.1136/hrt.80.5.423 VO 80 IS 5 A1 M K DAVIES A1 A HOLLMAN YR 1998 UL http://heart.bmj.com/content/80/5/423.abstract AB