RT Journal Article SR Electronic T1 The World Health Organisation JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 529 OP 529 DO 10.1136/hrt.78.6.529 VO 78 IS 6 A1 M K DAVIES A1 A HOLLMAN YR 1997 UL http://heart.bmj.com/content/78/6/529.abstract AB