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Latif AZ, Signorini D, Gregor A, Grant R, Ironside JW, Whittle IR.Latif AZ, et al.J Neurol Neurosurg Psychiatry. 1998 Jun;64(6):747-50. doi: 10.1136/jnnp.64.6.747.J Neurol Neurosurg Psychiatry. 1998.PMID: 9647303Free PMC article.Clinical Trial.