Abstract
1 Institute of Hygiene and Environmental Medicine, RWTH Aachen, Pauwelsstr. 30, D-52074 Aachen, Germany
2 Bremen Institute for Materials Testing, Foundation Institute for Materials Science, Paul-Feller-Str. 1, D-28199 Bremen, Germany
3 Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 2632 (IFZ), D-35392 Giessen, Germany
4 Eawag, Swiss Federal Institute of Aquatic Science and Technology, CH-8600 Dübendorf, Switzerland