RT Journal Article SR Electronic T1 Coronary artery bypass graft surgery provides clinically important quality-of-life improvements over medical therapy in patients with ischaemic left ventricular dysfunction JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 107 OP 107 DO 10.1136/ebmed-2015-110175 VO 20 IS 3 A1 Denis Bouchard YR 2015 UL http://ebm.bmj.com/content/20/3/107.abstract AB