1. Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City
2. Institute for Vision Research, University of Iowa, Iowa City
3. Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota
4. Moorfields Eye Hospital, London, England
5. Kings College Hospital, London, England
6. Kaiser Permanente, Seattle, Washington
7. Einhorn Clinical Research Center, New York Eye and Ear Infirmary of Mount Sinai, New York
8. Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, England
9. Department of Population and Quantitative Health Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio
10. Institute for Computational Biology, Case Western Reserve University School of Medicine, Cleveland, Ohio
11. Massachusetts Eye and Ear Infirmary, Harvard University, Boston