1. From the Departments of Ophthalmology and Visual Sciences,
2. From the Departments of Ophthalmology and Visual Sciences, 2Molecular and Integrative Physiology,
3. From the Departments of Ophthalmology and Visual Sciences, 3Microbiology and Immunology, and
4. From the Departments of Ophthalmology and Visual Sciences, 4Pathology, University of Michigan, Ann Arbor, Michigan.