Life Term Studies on the Effect of Trace Elements on Spontaneous Tumors in Mice and Rats 1

Abstract

SUMMARY Rats numbering 830 provided with a diet low in many trace elements and raised in an environment relatively free from con tamination were given small amounts (5 ppm) of arsenite, germanate, stannous, chromic, cadmium, or lead ions in drink ing water for their lifetimes. Mice numbering 540 taking the same diet were given 5 ppm of zirconium, antimony… (More)

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