1. Research Service, Veterans Affairs Health Care System, Minneapolis, Minnesota
2. Brain Sciences Center, Veterans Affairs Health Care System, Minneapolis, Minnesota
3. Department of Neuroscience, University of Minnesota Medical School, Minneapolis, Minnesota
4. Department of Psychiatry, University of Minnesota Medical School, Minneapolis, Minnesota
5. Center for Cognitive Sciences, University of Minnesota, Minneapolis, Minnesota
6. Minnesota Nutrition and Obesity Research Center, St. Paul, Minnesota
7. Geriatric Research Education Clinical Center, Veterans Affairs Health Care System, Minneapolis, Minnesota
8. Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, Minnesota