RT Journal Article SR Electronic T1 JournalScan JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1373 OP 1374 DO 10.1136/heart.89.11.1373 VO 89 IS 11 A1 Malik, Iqbal YR 2003 UL http://heart.bmj.com/content/89/11/1373.abstract AB