RT Journal Article SR Electronic T1 Hypertension JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 428 OP 428 DO 10.1136/hrt.79.5.428 VO 79 IS 5 A1 M K DAVIES A1 A HOLLMAN YR 1998 UL http://heart.bmj.com/content/79/5/428.abstract AB