Animal experimentation and its relevance to man.
1979
The problem of quantitatively estimating human cancer risk based upon animal carcinogenesis studies is reviewed. Mathematical functions for dose-response relationships are discussed with particular emphasis on multistage models. These models are based upon a single cell somatic mutation theory for the carcinogenesis process. It is shown that the multistage model and others which incorporate background additively are well approximated in low dose region by a linear function. The relationship between time-to-tumor and the multistage model is indicated. This relationship is important when dealing with less than life time exposure such as with data from many occupational studies. Design of bioassay experiments and its impact on risk estimation is noted. Finally, the problem of species-to-species extrapolation is considered.
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