Out of the mixture of cases in the list, suppose we want to explore how many cases would be prevented if we could remove just one cause, while the other causes remain as they were. Then we can calculate Fractional Causation by diet. In this manner, we calculate Fractional Causation, below, for each of the eight causes in Part 6 . Such addition is equivalent to counting the same cases of absent Cancer more than once. This year, the Committee will publish strong new evidence that ionizing radiation is such a carcinogen.
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