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Huamaní C, Mayta-Tristán P.Huamaní C, et al.Rev Peru Med Exp Salud Publica. 2010 Sep;27(3):315-25. doi: 10.1590/s1726-46342010000300003.Rev Peru Med Exp Salud Publica. 2010.PMID: 21152723Free article.Spanish.
Huamaní C.Huamaní C.Rev Peru Med Exp Salud Publica. 2010 Sep;27(3):367-72. doi: 10.1590/s1726-46342010000300009.Rev Peru Med Exp Salud Publica. 2010.PMID: 21152729Free article.Spanish.