1. Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine, 8 Teresy Street, 91-348 Lodz, Poland
2. Department of Toxicology and Carcinogenesis, Nofer Institute of Occupational Medicine, 8 Teresy Street, 91-348 Lodz, Poland
3. Department of Chemical Safety, Nofer Institute of Occupational Medicine, 8 Teresy Street, 91-348 Lodz, Poland
4. The Foundation for Children from Copper Basin, 10 Okrzei Street, 59-220 Legnica, Poland
5. Division of Epidemiology, Norwegian Institute of Public Health, P.O. Box 4404 Nydalen, 0403 Oslo, Norway