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In vivo rapid systemic toxicity of cobalt. A. Macroscopic examination of the liver, spleen, thymus, lymph node, brain, kidney and heart in the 0-5 ppm cobalt groups. B. Microscopic view of the liver, spleen, thymus, lymph node, brain, kidney and heart in the 0-5 ppm cobalt groups. H&E staining shows that the tissue structure in all the organs. Nissl's staining shows the structure of neurones. No toxic effect was observed.
