1. Dementia Research Service, Burke Medical Research Institute, White Plains, NY 10605;
2. ESA, Incorporated, Chelmsford, MA 01824;
3. Antioxidants Research Laboratory, Jean Mayer U.S. Department of Agriculture Human Nutrition Research Center on Aging at Tufts University, Boston, MA 02111; and
4. Departments of Biochemistry and Neuroscience, Cornell University Medical College, New York, NY 10021