PT - JOURNAL ARTICLE AU - N. Arai AU - H. Kan TI - Reply: AID - 10.3174/ajnr.A6473 DP - 2020 Mar 05 TA - American Journal of Neuroradiology 4099 - http://www.ajnr.org/content/early/2020/03/05/ajnr.A6473.short 4100 - http://www.ajnr.org/content/early/2020/03/05/ajnr.A6473.full