RT Journal Article SR Electronic T1 A comparison of normal intraarterial digital subtraction angiography with standard angiography in patients with symptomatic cerebrovascular ischemia. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 837 OP 838 VO 11 IS 4 A1 E O Lipchik A1 M W Mewissen YR 1990 UL http://www.ajnr.org/content/11/4/837.abstract AB