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Llaguno-Aguilar SE, Dorantes-Alonso Adel C, Thrasher JF, Villalobos V, Besley JC.Llaguno-Aguilar SE, et al. Among authors: thrasher jf.Salud Publica Mex. 2008;50 Suppl 3:S348-54. doi: 10.1590/s0036-36342008000900012.Salud Publica Mex. 2008.PMID: 18604356Spanish.