RT Journal Article SR Electronic T1 Amplatzer device closure of atrial septal defects in mature adults: analysis of 76 cases JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 334 OP 335 DO 10.1136/hrt.2002.008516 VO 90 IS 3 A1 Hildick-Smith, D J R A1 O’Sullivan, M A1 Wisbey, C R A1 Mackay, J H A1 Lee, E M A1 Shapiro, L M YR 2004 UL http://heart.bmj.com/content/90/3/334.abstract AB