1. Institute of Cancer Research, Medical University of Vienna, Borschkegasee 8a, A-1090 Vienna (E-mail: wilfried.bursch@medunivie.ac.at)
2. Institute for Sanitary Engineering and Water Pollution Control, BOKU-University of Natural Resources and Applied Life Sciences, Vienna, Muthgasse 18, A-1190 Vienna (E-mail: h520t7@edv2.boku.ac.at)
3. Aquatic Ecotoxicology, Institutes for Biochemistry, Medical Chemistry, and Histology and Embryology, University of Veterinary Medicine, Vienna, Veterinärplatz 1, A-1210 Vienna (E-mail: Britta.Grillitsch@vu-Vienna.ac.at)
4. Institute of Applied Microbiology, BOKU-University of Natural Resources and Applied Life Sciences, Vienna, Muthgasse 18, A-1019 Vienna (E-mail: jungbauer@hp01.boku.ac.at)
5. Institute for Water Quality and Waste Management, Vienna University of Technology, Department for Chemistry and Biology of Water, Karlsplatz 13/226, A-1040 Vienna (E-mail: norbkreu@iwag.tuVienna.ac.at; s.skutan@awsnt.tuVienna.ac.at)
6. Federal Environment Agency, Analytics, Spittelauer Lände 5, A-1090 Vienna (E-mail: scharf@ubavie.gv.at)
7. Institute of Analytical Chemistry, University of Vienna, Währinger Stra§e 38, A-1090 Vienna (E-mail: erich.schmid@univie.ac.at)