RT Journal Article SR Electronic T1 Natural history of Ebstein's anomaly of tricuspid valve in childhood and adolescence. An international co-operative study of 505 cases. JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 417 OP 427 DO 10.1136/hrt.36.5.417 VO 36 IS 5 A1 H Watson YR 1974 UL http://heart.bmj.com/content/36/5/417.abstract AB