RT Journal Article SR Electronic T1 Reply JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1184 OP 1184 VO 20 IS 6 A1 Nick Bryan A1 John Mathis A1 Daniele Rigamonti YR 1999 UL http://www.ajnr.org/content/20/6/1184.1.abstract