1. Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin.
2. Department of Biostatistics and Medical Informatics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin.
3. Department of Ophthalmology and Visual Science, Yale School of Medicine, New Haven, Connecticut.
4. Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, Massachusetts.
5. White River Junction Veteran's Affairs Medical Center, Veteran's Health Administration, White River Junction, Vermont.
6. Harvard Medical School, Massachusetts General Hospital Chelsea HealthCare Center, Boston, Massachusetts.
7. Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, Massachusetts.