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
4. Departments of Biochemistry and Neuroscience, Cornell University Medical College, New York, NY 10021