RT Journal Article SR Electronic T1 Heart of Darkness JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology DO 10.3174/ajnr.A2976 A1 M. Castillo YR 2012 UL http://www.ajnr.org/content/early/2012/02/16/ajnr.A2976.abstract AB