RT Journal Article SR Electronic T1 Evaluating risks and benefits in coronary revascularisation—a very imperfect art? JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 6 OP 8 DO 10.1136/hrt.2007.141440 VO 95 IS 1 A1 Mark A de Belder A1 Leslie Hamilton YR 2009 UL http://heart.bmj.com/content/95/1/6.abstract AB