1. Wilmer Eye Institute, Johns Hopkins University School of Medicine and Hospital, Baltimore, Maryland
2. Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois College of Medicine, Chicago
3. Outcomes Insights, Inc, Westlake Village, California
4. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
5. Genentech, Inc, South San Francisco, California