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Schmand B, de Bie RM, Koning-Haanstra M, de Smet JS, Speelman JD, van Zomeren AH.Schmand B, et al.Neurology. 2000 Mar 14;54(5):1058-64. doi: 10.1212/wnl.54.5.1058.Neurology. 2000.PMID: 10720274Clinical Trial.