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Gusi N, del Pozo-Cruz B, Olivares PR, Hernández-Mocholi M, Hill JC.Gusi N, et al.Aten Primaria. 2011 Jul;43(7):356-61. doi: 10.1016/j.aprim.2010.05.019. Epub 2011 Feb 5.Aten Primaria. 2011.PMID: 21296465Free PMC article.