1. Institute of Medical Psychology and Behavioral Neurobiology, University of Tübingen, Tübingen, Germany.
2. Max-Planck-Institute for Biological Cybernetics, Tübingen, Germany.
3. Biomedical Magnetic Resonance, Universitätsklinikum Tübingen, Tübingen, Germany.
4. Princeton Neuroscience Institute, Princeton University, Princeton, NJ, USA.