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Tumor-promoting activity of cigarette tar in rat skin exposed to irradiation
Journal of the National Cancer Institute
|February 1, 1976
Abstract:
A threefold increase (P=0.006) in the number of skin tumors induced by beta irradiation was demonstrated in rats after surface applications of cigarette tar. The effect appeared due to a tumor-promoting activity of the cigarette tar rather than to an additive tumorigenic effect of the two agents.