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. 2014 Oct 10;123(2):120–127. doi: 10.1289/ehp.1408094

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Representative photomicrographs showing the accumulation of iron in the spleen (A) and kidney (B) from rats treated with Pb²⁺ in drinking water [0 (control), 250, or 1,000 ppm] for 12 weeks. Iron is indicated by Prussian blue staining; bars = 100 μm.