1. Laboratory of Immunology, National Eye Institute, National Institutes of Health, Bethesda, Maryland
2. Biological Imaging Core, National Eye Institute, National Institutes of Health, Bethesda, Maryland
3. Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom
4. Laboratory of Retinal Cell and Molecular Biology, National Eye Institute, National Institutes of Health, Bethesda, Maryland