RT Journal Article SR Electronic T1 Outpatient clinics for adults with congenital heart disease JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 256 OP 256 DO 10.1136/hrt.82.2.256 VO 82 IS 2 A1 L J FREEMAN A1 A J PAGE YR 1999 UL http://heart.bmj.com/content/82/2/256.abstract AB