RT Journal Article SR Electronic T1 Pitfalls in the Surgical Closure of Atrial Septal Defect JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 166 OP 175 VO 28 IS 3 A1 Effler, Donald B. A1 Groves, Laurence K. YR 1961 UL http://www.ccjm.org/content/28/3/166.abstract AB