Lung Cancer in Man in Relation to Different Time Distribution of Radiation Exposure

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The excess of lung cancer observed in the years 1948–1975 in a large group of uranium miners was related to different conditions of long-term exposure to radon daughter products. The dose-effect relationship differed with different time distribution of exposure; at higher cumulated exposure the lung cancer incidence per unit of exposure decreased with the increase of exposure rate. This decrease concerned mainly the incidence of small cell undifferentiated type of cancer.

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