RT Journal Article SR Electronic T1 Screening for fetal congenital heart disease JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E468 OP E468 DO 10.1503/cmaj.160700 VO 189 IS 12 A1 Alice Pham A1 Mary Melchior YR 2017 UL http://www.cmaj.ca/content/189/12/E468.abstract