1. Department of Ophthalmology, Dean McGee Eye Institute, University of Oklahoma, Oklahoma City, Oklahoma
2. Department of Ophthalmology and Visual Sciences, University of Michigan Kellogg Eye Center, Ann Arbor, Michigan
3. Department of Ophthalmology and Visual Sciences, Washington University School of Medicine, St. Louis, Missouri
4. Krieger Eye Institute, Sinai Hospital of Baltimore, Baltimore, Maryland
5. Department of Ophthalmology, Weill Cornell Medical College, New York, New York
6. Eye Center, University of Pittsburgh, Pittsburgh, Pennsylvania
7. Department of Ophthalmology, Vanderbilt University Medical Center, Nashville, Tennessee
8. Department of Biostatistics and Epidemiology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
9. Department of Ophthalmology, Flaum Eye Institute, University of Rochester School of Medicine and Dentistry, Rochester, New York