RT Journal Article SR Electronic T1 Ambulatory blood pressure monitoring in the management of hypertension JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 571 OP 576 DO 10.1136/heart.89.5.571 VO 89 IS 5 A1 O’Brien, Eoin YR 2003 UL http://heart.bmj.com/content/89/5/571.abstract AB