1. Department of Genetic Ecotoxicology, Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, and Health Institute of Central Bohemia, Prague, Czech Republic;
2. International Agency for Research on Cancer, Lyon, France;
3. Epidemiology and Biostatistics, National Cancer Research Institute, Genova, Italy;
4. Center of Industrial Hygiene and Occupational Diseases, National Institute of Public Health, Prague, Czech Republic