RT Journal Article SR Electronic T1 Acardia acephalus fetus in a twin pregnancy JF Neurosciences Journal JO Neurosciences (Riyadh) FD Prince Sultan Military Medical City SP 86 OP 87 VO 12 IS 1 A1 Moradan, Sanam YR 2007 UL http://nsj.org.sa/content/12/1/86.abstract AB