Summary of major conclusions from the 6th International Workshop on Genotoxicity Testing (IWGT), Foz do Iguaçu, Brazil

- Comet assay workgroup.
- Micronucleus test (MNT) in the liver and other organs other than bone marrow.
- Pig-a working group.
- Quantitative approaches to genotoxicity risk assessment.
- Approaches for identifying germ cell mutagens.