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Rad AE, Kallmes DF.Rad AE, et al. Among authors: kallmes df.AJNR Am J Neuroradiol. 2008 Oct;29(9):1622-6. doi: 10.3174/ajnr.A1186. Epub 2008 Jun 26.AJNR Am J Neuroradiol. 2008.PMID: 18583403Free PMC article.