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Herrera MG, Nestel P, el Amin A, Fawzi WW, Mohamed KA, Weld L.Herrera MG, et al. Among authors: fawzi ww.Lancet. 1992 Aug 1;340(8814):267-71. doi: 10.1016/0140-6736(92)92357-l.Lancet. 1992.PMID: 1353192Clinical Trial.