RT Journal Article SR Electronic T1 Reply: JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP E37 OP E37 DO 10.3174/ajnr.A2019 VO 31 IS 3 A1 Dai, D. A1 Kallmes, D.F. YR 2010 UL http://www.ajnr.org/content/31/3/E37.abstract AB