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den Hertog HM, van Rossum JA, van der Worp HB, van Gemert HM, de Jonge R, Koudstaal PJ, Dippel DW; PAIS investigators.den Hertog HM, et al.J Neurol. 2009 Dec;256(12):2003-8. doi: 10.1007/s00415-009-5228-x.J Neurol. 2009.PMID: 19609738Free PMC article.Clinical Trial.