1. Research Centre for Toxic Compounds in the EnvironmentFaculty of Science, Masaryk University Kamenice 5, building A29, 625 00 Brno Czech Republic
2. Department of Experimental BiologyFaculty of Science, Masaryk University Kamenice 753/5, 625 00 Brno Czech Republic
3. Institute of Biogeochemistry and Pollutant DynamicsETH Zurich Universitätstrasse 16, 8092 Zürich Switzerland