RT Journal Article SR Electronic T1 The spectrum of congenital heart diseases in down syndrome JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 1294 OP 1295 DO 10.15537/smj.2016.11.16359 VO 37 IS 11 A1 Mahmood D. Al-Mendalawi YR 2016 UL http://smj.org.sa/content/37/11/1294.abstract AB