1. Department of Ophthalmology, Moorfields Eye Hospital, London, UK
2. Centre for Clinical Brain Sciences, School of Clinical Sciences, University of Edinburgh, Edinburgh, UK
3. Shiley Eye Institute, University of California, San Diego, La Jolla, CA, USA
4. Medical Research Council Human Genetics Unit, Medical Research Council Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
5. Department of Hematology, University of Cambridge, Cambridge, UK
6. NIHR BioResource - rare diseases, Cambridge University Hospitals NHS Foundation Trust, Cambridge Biomedical Campus, Cambridge, UK
7. Institute of Ophthalmology, University College London, London, UK
8. Department of Medical Genetics, University of Cambridge, Cambridge, UK