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.A1146 A1 C. Zhong YR 2008 UL http://www.ajnr.org/content/early/2008/06/19/ajnr.A1146.abstract AB