3Tatala S,Svanberg J,Mdurma B.Low dietary iron availability is a major cause of anemia:a nutririon survey in the Lindi District of Tanzania[J].Am J Clin Nutr,1998,68:171-178.
4Stoltzfus R,Chwaya H,Tielsch J,et al.Epidemiology of iron deficiency in Zanzibari schoolchildren:the importance of hookworms[J].Am J Clin Nutr,1997,65:153-159.