1. Department of Ophthalmology and Visual Sciences, University of Wisconsin, Madison, Wisconsin, United States
2. Center for Human Genetics, Duke University Medical Center, Durham, North Carolina, United States
3. Biotechnology Center, University of Wisconsin, Madison, Wisconsin, United States
4. The National Eye Clinic, Rigshospitalet, Kennedy Center, Glostrup, Denmark 5Institute of Clinical Medicine, University of Copenhagen, Denmark