RT Journal Article SR Electronic JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1275 OP 1275 DO 10.3174/ajnr.P0036 VO 38 IS 7 A1 Jonathan Kleefield YR 2017 UL http://www.ajnr.org/content/38/7/1275.abstract AB