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Fan X, Turner JE, Turner TM, Elrod JP, Clough JA, Howell EI, Johnson MD.Fan X, et al. Among authors: clough ja.AJNR Am J Neuroradiol. 2001 Oct;22(9):1778-81.AJNR Am J Neuroradiol. 2001.PMID: 11673179Free PMC article.Review.