RT Journal Article SR Electronic T1 New catheter for tortuous vertebral artery. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 85 OP 86 VO 3 IS 1 A1 Guinto, F C YR 1982 UL http://www.ajnr.org/content/3/1/85.abstract AB