1. Department of Neuroscience, Baylor College of Medicine, Houston, TX, USA.
2. Bernstein Centre for Computational Neuroscience, Tübingen, Germany.
3. Institute for Ophthalmic Research, University of Tübingen, Tübingen, Germany.
4. Werner Reichardt Center for Integrative Neuroscience and Institute of Theoretical Physics, University of Tübingen, Tübingen, Germany.
5. Max Planck Institute for Biological Cybernetics, Tübingen, Germany.