1. From the Laboratory of Immunology, National Eye Institute, National Institutes of Health, Bethesda, Maryland.2Present address: Department of Immunology, Holland Laboratory of the American Red Cross, Rockville, Maryland; and
2. From the Laboratory of Immunology, National Eye Institute, National Institutes of Health, Bethesda, Maryland.
3. From the Laboratory of Immunology, National Eye Institute, National Institutes of Health, Bethesda, Maryland.3Duke University School of Medicine, Durham, North Carolina.