RT Journal Article SR Electronic T1 Reply: JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP E33 OP E33 DO 10.3174/ajnr.A3514 VO 34 IS 3 A1 van den Berg, R. A1 Schneiders, J.J. A1 Ferns, S.P. A1 Majoie, C.B. A1 Vanbavel, E. YR 2013 UL http://www.ajnr.org/content/34/3/E33.abstract AB