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Cano de la Cuerda R, Vela L, Miangolarra-Page JC, Macías-Macías Y, Muñoz-Hellín E.Cano de la Cuerda R, et al.Rev Neurol. 2010 Aug 16;51(4):193-200.Rev Neurol. 2010.PMID: 20648462Free article.Spanish.