RT Journal Article SR Electronic JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology DO 10.3174/ajnr.A2929 A1 Castillo, M. YR 2011 UL http://www.ajnr.org/content/early/2011/12/22/ajnr.A2929.abstract AB