1. From the Division of Ocular Neurodegeneration and 2Institute of Animal Welfare, Ethology and Animal Hygiene, Faculty of Veterinary Medicine, Ludwig-Maximilians-University, Munich, Germany;
2. From the Division of Ocular Neurodegeneration and
3. Laboratory of Retinal Cell Biology, Department of Ophthalmology, University of Zurich, Zurich, Switzerland;
4. the Division for Experimental Ophthalmology, Institute for Ophthalmic Research, Centre for Ophthalmology, Tuebingen, Germany;
5. Ocular Genetics Unit, Trinity College, Dublin, Ireland; and
6. National Eye Institute, National Institutes of Health, Bethesda, Maryland.