The Environmental Protection Agency is evaluating data from the past decade that suggest dioxin's toxicity may be overestimated. A risk assessment model based on biological mechanism is being drawn up.
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Culliton, B. US government orders new look at dioxin. Nature 352, 753 (1991). https://doi.org/10.1038/352753a0
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DOI: https://doi.org/10.1038/352753a0