1. International Graduate School of Neuroscience; Ruhr-University Bochum, Universitätsstr; 150, D-44801 Bochum Germany
2. Donders Institute for Brain; Cognition and Behaviour, Center for Cognitive Neuroimaging, Radboud University Nijmegen; Kapittelweg 29, NL-6525 EN Nijmegen The Netherlands
3. Faculty of Psychology; Mercator Research Group-Structure of Memory; Ruhr-University Bochum; Universitätsstr; 150, D-44801 Bochum Germany