RT Journal Article SR Electronic T1 Reply JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology DO 10.3174/ajnr.A0760 A1 Mauricio Castillo A1 Harry J. Cloft YR 2007 UL http://www.ajnr.org/content/early/2007/11/27/ajnr.A0760.abstract AB