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Jiménez-Aguilar A, Flores M, Shamah-Levy T.Jiménez-Aguilar A, et al.Salud Publica Mex. 2009;51 Suppl 4:S604-12. doi: 10.1590/s0036-36342009001000015.Salud Publica Mex. 2009.PMID: 20464236