PT - JOURNAL ARTICLE AU - A.S. Larson AU - W. Brinjikji TI - Reply: AID - 10.3174/ajnr.A6986 DP - 2021 Apr 01 TA - American Journal of Neuroradiology PG - E28--E28 VI - 42 IP - 4 4099 - http://www.ajnr.org/content/42/4/E28.short 4100 - http://www.ajnr.org/content/42/4/E28.full SO - Am. J. Neuroradiol.2021 Apr 01; 42