19699
This allowed assessment of : available evidence for the nature of dose - response relationships at human relevant exposures ; the generality of judgments about such dose - response relationships ; uncertainties affecting judgments on the nature of such dose - response relationships ; and whether this last should differ for different classes of genotoxic carcinogens .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None