RT Journal Article SR Electronic T1 Reply: JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP E31 OP E31 DO 10.3174/ajnr.A1998 VO 31 IS 2 A1 E.M. Genden YR 2010 UL http://www.ajnr.org/content/31/2/E31.abstract AB