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Tas MW, Barkhol F, van Walderveen MA, Polman CH, Hommes OR, Valk J.Tas MW, et al. Among authors: polman ch.AJNR Am J Neuroradiol. 1995 Feb;16(2):259-64.AJNR Am J Neuroradiol. 1995.PMID: 7726070Free PMC article.