1. From the Center of Ophthalmology, Biomedical Institute for Research in Light and Image, University of Coimbra, Portugal; and the2Laboratory for Nutrition and Vision Research, Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Bost
2. Laboratory for Nutrition and Vision Research, Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts.