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Louis ED, Benito-León J, Bermejo-Pareja F; Neurological Disorders in Central Spain (NEDICES) Study Group.Louis ED, et al.Neurology. 2008 May 6;70(19):1682-7. doi: 10.1212/01.wnl.0000311271.42596.32.Neurology. 2008.PMID: 18458228Free PMC article.