RT Journal Article SR Electronic T1 Werner Forssmann JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 409 OP 409 DO 10.1136/heart.87.5.409 VO 87 IS 5 A1 M K Davies A1 A Hollman YR 2002 UL http://heart.bmj.com/content/87/5/409.abstract AB