1. Department of Medicine, Duke University Medical Center, Durham, North Carolina 2Department of Ophthalmology, Duke University Medical Center, Durham, North Carolina
2. Unit of Ophthalmology, Department of Surgery, University of Ghana Medical School, Accra, Ghana
3. Department of Medicine, Duke University Medical Center, Durham, North Carolina
4. Eye Doctors of Washington DC, Washington, DC
5. Department of Ophthalmology, Duke University Medical Center, Durham, North Carolina
6. Einhorn Clinical Research Center, Department of Ophthalmology, New York Eye and Ear Infirmary, New York, New York
7. Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, Michigan
8. Department of Ophthalmology, Harvard Medical School, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts
9. Department of Ophthalmology, University of Alabama at Birmingham, Birmingham, Alabama
10. Department of Ophthalmology, University of North Carolina, Chapel Hill, North Carolina
11. Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, Michigan 10Department of Epidemiology, University of Michigan, Ann Arbor, Michigan