1. Department of Food Chemistry, Institute of Nutritional Science, University of Potsdam, Arthur-Scheunert-Allee 114–116, 14558 Nuthetal, Germany
2. TraceAge-DFG Research Unit on Interactions of Trace Elements in Healthy and Diseased Elderly (FOR 2558), Berlin-Potsdam-Jena-Wuppertal, 14558 Nuthetal, Germany
3. Institute of Chemistry – Analytical Chemistry, University of Graz, Universitätsplatz 1/I, 8010 Graz, Austria
4. German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, 10589 Berlin, Germany