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Cabieses B, Espinoza MA.Cabieses B, et al. Among authors: espinoza ma.Rev Peru Med Exp Salud Publica. 2011 Jun;28(2):288-97. doi: 10.1590/s1726-46342011000200017.Rev Peru Med Exp Salud Publica. 2011.PMID: 21845310Free article.Review.Spanish.