RT Journal Article SR Electronic T1 Additional defect of unknown origin noted in cerebral angiographic study. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 148 OP 148 VO 3 IS 2 A1 A A Chambers YR 1982 UL http://www.ajnr.org/content/3/2/148.abstract AB