RT Journal Article SR Electronic T1 The risks of vertebral angiography in vertebrobasilar disease. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 415 OP 416 VO 13 IS 1 A1 Pexman, J H YR 1992 UL http://www.ajnr.org/content/13/1/415.abstract AB