1. From the Departments of Ophthalmology and2Dean A. McGee Eye Institute, Oklahoma City, Oklahoma; and the
2. From the Departments of Ophthalmology and3Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma; the2Dean A. McGee Eye Institute, Oklahoma City, Oklahoma; and the
3. Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma; the2Dean A. McGee Eye Institute, Oklahoma City, Oklahoma; and the
4. Department of Animal Sciences, University of Missouri, Columbia, Missouri.