1. Section of Ecotoxicology and Risk Assessment, Norwegian Institute for Water Research (NIVA), Gaustadalléen 21, N-0349 Oslo, Norway
2. Centre for Environmental Radioactivity (CERAD), Norwegian University of Life Sciences (NMBU), P.O. Box 5003, N-1432 Ås, Norway
3. Faculty of Bioscience Engineering, Laboratory of Environmental Toxicology and Aquatic Ecology (GhEnToxLab), Ghent University, Campus Coupure Building F, Second Floor, Coupure Links 653, B9000 Ghent, Belgium