1. From the Duke University Eye Center, Durham, North Carolina;2Duke University Center for Human Genetics, Durham, North Carolina;
2. Institute of Ophthalmology, University College London, London, United Kingdom;4Moorfields Eye Hospital, London, United Kingdom;
3. Duke University Center for Human Genetics, Durham, North Carolina;
4. National Eye Clinic for the Visually Impaired, Copenhagen, Denmark; and
5. Gordon Norrie Centre, National Eye Clinic, Hellerup, Denmark.
6. Institute of Ophthalmology, University College London, London, United Kingdom;
7. From the Duke University Eye Center, Durham, North Carolina;