1. Institute of Social and Preventive Medicine, University of Basel, Basel, Switzerland, Institute of Mineralogy and Petrography, Geochemical Laboratory, University of Basel, Basel, Switzerland, Institute of Hygiene and Applied Physiology, Swiss Federal Institute of Technology, Zürich, Switzerland, University of Athens, Medical School, Athens, Greece, KTL, Department of Environmental Health, Kuopio, Finland, and Regional Institute of Hygiene of Central Bohemia, Laboratory of Genetic Ecotoxicology, Prague,...