1. From the Division of Medical Molecular Genetics and Gene Diagnostics, Institute of Medical Genetics, University of Zurich, Schwerzenbach, Switzerland; the2Institute for Chemistry and Biochemistry, Free University Berlin, Berlin, Germany; the
2. Fifth Medical Clinic, Medical Faculty of the University Heidelberg, Mannheim, Germany; the
3. Retinal Electrodiagnostics Research Group, University of Tu¨bingen, Tu¨bingen, Germany; and the
4. From the Division of Medical Molecular Genetics and Gene Diagnostics, Institute of Medical Genetics, University of Zurich, Schwerzenbach, Switzerland; the
5. Laboratory for Retinal Cell Biology, University Hospital Zurich, Zurich, Switzerland.