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Table 6 Number of chemicals in Ames/QSAR international challenge project

From: An assessment of mutagenicity of chemical substances by (quantitative) structure–activity relationship

Class Phase I (2014–2015) Phase II (2015–2016) Phase III (2016–2017) Total (2014–2017)
Positive 556 (14.5%) 562 (14.7%) 629 (14.3%) 1757 (14.4%)
Negative 3336 (85.5%) 3267 (85.3%) 3780 (85.7%) 10,383 (85.6%)
Total 3902 3829 4409 12,140