RT Journal Article SR Electronic T1 Level of Evidence during the COVID-19 Pandemic: Making the Case for Case Series and Case Reports JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1646 OP 1646 DO 10.3174/ajnr.A6676 VO 41 IS 9 A1 Ikuta, I. YR 2020 UL http://www.ajnr.org/content/41/9/1646.abstract AB