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Ríos-Díaz J, de Groot Ferrando A, Martínez-Payá JJ, del Baño Aledo ME.Ríos-Díaz J, et al.Reumatol Clin. 2010 Nov-Dec;6(6):278-84. doi: 10.1016/j.reuma.2010.01.008. Epub 2010 May 13.Reumatol Clin. 2010.PMID: 21794733Free article.Spanish.