1. From the Department of Neuroanatomy, Max-Planck-Institute for Brain Research, Frankfurt/M, Germany; the
2. Retinal Electrodiagnostics Research Group, Department of Ophthalmology, University of Tu¨bingen, Tu¨bingen, Germany; the
3. Institute of Pharmacology, Center for Drug Research, Ludwig-Maximilian University, Munich, Germany; and the
4. Department of Genetics, Trinity College, The University of Dublin, Ireland.