1. Centre for Vision and Vascular Science, Queen's University Belfast, Belfast, Northern Ireland, United Kingdom
2. Department of Ophthalmology and Vision Sciences, The Hospital for Sick Children, Toronto, Ontario, Canada
3. Meir Medical Center, Kfar Saba, Israel
4. Department of Ophthalmology, Belfast Health and Social Care Trust, Belfast, Northern Ireland, United Kingdom
5. St. Paul's Eye Unit, Royal Liverpool University Hospital, Liverpool, United Kingdom
6. Center for Human Genetics, Duke University Medical Center, Durham, North Carolina
7. School of Clinical Sciences, University of Bristol and Bristol Eye Hospital, Bristol, United Kingdom
8. Centre for Vision and Vascular Science, Queen's University Belfast, Belfast, Northern Ireland, United Kingdom 4Department of Ophthalmology, Belfast Health and Social Care Trust, Belfast, Northern Ireland, United Kingdom 8Department of Eye and Vision Scien