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To estimate the risk of metal (Cu, Zn, Pb, and Cd) exposure of tree sparrows through food at different life stages (including nestling, juvenile, adult in summer, and adult in winter), metal daily intake (MDI), metal daily intake per unit of body weight (MDIBW), and exposure risks (hazard quotient and hazard index) of tree sparrows at different life stages from a polluted area, Baiyin, and a control...
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