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Leal-Hernández M, Abellán-Alemán J, Sánchez-Sánchez A.Leal-Hernández M, et al. Among authors: abellan aleman j.Aten Primaria. 2006 May 15;37(8):468-9. doi: 10.1157/13088892.Aten Primaria. 2006.PMID: 16756850Free PMC article.Spanish.