1. Department of Chemistry, Division of Food Chemistry and Environmental Toxicology, University of Kaiserslautern, Erwin-Schroedinger Strasse 52, 67663 Kaiserslautern, Germany, Institute of Applied Biosciences, Section of Food Toxicology, University of Karlsruhe, Kaiserstrasse 12, 76131 Karlsruhe, Germany, Institute of Clinical Chemistry and Laboratory Diagnostics, Heinrich Heine University, Medical School, Moorenstrasse 5, 40225 Duesseldorf, Germany, Department of Molecular Biology, University of Aarhus, C...