RT Journal Article SR Electronic T1 Reply: JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP E56 OP E56 DO 10.3174/ajnr.A5242 VO 38 IS 8 A1 R.D. Nawfel A1 G.S. Young YR 2017 UL http://www.ajnr.org/content/38/8/E56.abstract AB