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de Lourdes Flores M, Neufeld LM, González-Cossío T, Rivera J, Martorell R, Ramakrishnan U.de Lourdes Flores M, et al. Among authors: neufeld lm.Salud Publica Mex. 2007 May-Jun;49(3):190-8. doi: 10.1590/s0036-36342007000300004.Salud Publica Mex. 2007.PMID: 17589773Clinical Trial.