1. From the Graduate Program in Immunology, the Departments of 2Ophthalmology,
2. From the Graduate Program in Immunology, 4Starzl Transplantation Institute, and
3. the Departments of Ophthalmology,
4. the Department of Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania.
5. the Departments of Ophthalmology, 6Molecular Genetics and Biochemistry, and 7Immunology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania; and