RT Journal Article SR Electronic T1 Reply JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1384 OP 1384 VO 20 IS 7 A1 Cheng-Yu Chen YR 1999 UL http://www.ajnr.org/content/20/7/1384.abstract AB