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Alexander MD, Cooke DL, Nelson J, Guo DE, Dowd CF, Higashida RT, Halbach VV, Lawton MT, Kim H, Hetts SW.Alexander MD, et al. Among authors: higashida rt.AJNR Am J Neuroradiol. 2015 May;36(5):949-52. doi: 10.3174/ajnr.A4224. Epub 2015 Jan 29.AJNR Am J Neuroradiol. 2015.PMID: 25634722Free PMC article.