TY - JOUR T1 - Reply: JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. DO - 10.3174/ajnr.A6986 AU - A.S. Larson AU - W. Brinjikji Y1 - 2021/03/04 UR - http://www.ajnr.org/content/early/2021/03/04/ajnr.A6986.abstract N2 - ER -