RT Journal Article SR Electronic T1 The challenge of carotid occlusion. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1047 OP 1048 VO 13 IS 3 A1 Piepgras, A A1 Schmeidek, P A1 Olteanu-Nerbe, V A1 Reulen, H J YR 1992 UL http://www.ajnr.org/content/13/3/1047.2.abstract AB