RT Journal Article SR Electronic T1 Secundum atrial septal defect in the adult: repair using cardiopulmonary bypass in 133 patients JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 269 OP 274 VO 97 IS 6 A1 H. E. Aldridge A1 J. Yao YR 1967 UL http://www.cmaj.ca/content/97/6/269.abstract