1. From the Division of Medical Molecular Genetics and Gene Diagnostics, Institute of Medical Genetics, University of Zurich, Schwerzenbach, Switzerland;
2. Department of Ophthalmology, Charité Campus Virchow Clinic, University Medical Center, Berlin, Germany;
3. Department of Pediatric Oncology/Hematology, Charité, Universitätsmedizin Berlin, Berlin, Germany;
4. Leibniz Institute for Molecular Pharmacology, Berlin, Germany; and
5. Division of Molecular Therapy, UCL Institute of Ophthalmology, London, United Kingdom.