1. From the Department of Ophthalmology, University of Freiburg, Freiburg, Germany; the
2. Division of Medical Molecular Genetics and Gene Diagnostics, Institute of Medical Genetics, University of Zurich, Schwerzenbach, Switzerland; and the4Department of Biology, ETH Zurich, Zurich, Switzerland.
3. Division of Medical Molecular Genetics and Gene Diagnostics, Institute of Medical Genetics, University of Zurich, Schwerzenbach, Switzerland; and the