1. From the Division of Neuroscience, Oregon National Primate Research Center, and the2Departments of Medicine and Ophthalmology, Oregon Health and Science University, Portland, Oregon;
2. The Schepens Eye Research Institute, the4Department of Ophthalmology, and the
3. Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts.
4. The Schepens Eye Research Institute, the4Department of Ophthalmology, and the6Program in Neuroscience, Harvard Medical School, Boston, Massachusetts; and the