RT Journal Article SR Electronic T1 JournalScan JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 112 OP 112 DO 10.1136/heart.88.1.112 VO 88 IS 1 A1 Iqbal Malik YR 2002 UL http://heart.bmj.com/content/88/1/112.abstract AB