The Influence of Dietary Zinc and Vitamin A Levels on Vitamin A Metabolism
liang hong-yan wang yu-hai gao hong-wei li ji-ping zhang jia-bao(1.the animal s scientific and technological institute in hei longjiang land-cultive university; hei longjiang daqing 163319; 2.the scientific and agricultural institute of the daqing oil field; hei longjiang daqing 164311; 3.the university of the chinese people s liberation army s military supplies; jiling changchun 130062)
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