1. Bascom Palmer Eye Institute; University of Miami Miller School of Medicine; Miami Florida USA
2. Department of Epidemiology; Johns Hopkins Bloomberg School of Public Health; Baltimore Maryland USA
3. Retina Service, Wills Eye Hospital; Thomas Jefferson University; Philadelphia Pennsylvania USA
4. Flaum Eye Institute; University of Rochester Medical Center; Rochester NY USA
5. Department of Ophthalmology; University of Colorado Anschutz Medical Campus; Denver Colorado USA