1. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
2. Byers Eye Institute, Stanford University School of Medicine, Palo Alto, California
3. Department of Ophthalmology and Visual Sciences, Albert Einstein College of Medicine, Montefiore Medical Center, Bronx, New York
4. Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland
5. Department of Ophthalmology, Howard University Hospital, Washington, DC
6. Frank and Ray Stark Foundation, David Geffen School of Medicine at UCLA, Los Angeles, California
7. Eye Clinic, Department of Translational Surgery and Medicine, University of Florence, Careggi Hospital, Florence, Italy