1. Bernstein Center for Computational Neuroscience, German Primate Center-Leibniz Institute for Primate Research, Göttingen, Germany;
2. Systems Neurophysiology Group, Werner Reichardt Centre for Integrative Neuroscience, University of Tübingen, Tübingen, Germany; and
3. Department of Cognitive Neurology, Hertie Institute for Clinical Brain Research, Tübingen, Germany