1. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
2. Welch Medical Library, Johns Hopkins University, Baltimore, Maryland
3. Department of Health Services, Policy, and Practice (Primary), Brown University School of Public Health, Providence, Rhode Island
4. Department of Epidemiology (Joint), Brown University School of Public Health, Providence, Rhode Island
5. American Academy of Ophthalmology, San Francisco, California
6. Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor
7. Department of Epidemiology, University of Michigan, Ann Arbor
8. Wilmer Eye Institute, Johns Hopkins School of Medicine, Baltimore, Maryland