1. Research Service, Louis Stokes Cleveland VA Medical Center, Cleveland, OH 44106-5068, USA
2. Department of Ophthalmology and Visual Sciences, University Hospitals Eye Institute, University Hospitals Case Medical Center, Case Western Reserve University, 11100 Euclid Avenue, LKSD 4107, Cleveland, OH 44106-5068, USA
3. The Retina Group of Washington, Fairfax, VA 22031-4621, USA
4. Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, FL 33136, USA
5. Section of Immunopathology, Laboratory of Immunology, National Eye Institute, National Institutes of Health, Bethesda, MD 20892-3655, USA