1. Johns Hopkins University School of Medicine, Baltimore, MD, USA
2. Retina Service, Midwest Eye Institute, Indianapolis, IN, USA
3. Retina Division, Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD, USA
4. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
5. Department of Ophthalmology, Indiana University School of Medicine, Indianapolis, IN, USA