1. From the Departments of Ophthalmology and
2. Pfizer Corporation, St. Louis, Missouri; the
3. Department of Pathology and Anatomy, University of Texas Health Science Center, Fort Worth, Texas; and the
4. From the Departments of Ophthalmology and2Pfizer Corporation, St. Louis, Missouri; the
5. From the Departments of Ophthalmology and5Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, Nebraska; the