Reconsideration of chlorpyrifos:

Blood chlorpyrifos levels increased by 466–fold (corn oil) and 165–fold (milk) for a 100-fold increase in dose (0.5 to 5 mg/kg bw). Blood chlorpyrifos-oxon levels were not detectable at any oral dose of chlorpyrifos-oxon, and detectable only at doses of chlorpyrifos greater than 0.5 mg/kg (in corn oil) or 2 … ................
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