1. Center for the Study of Aging and Human Development, Department of Psychiatry and Behavioral Sciences; Duke University Medical Center; Durham NC USA
2. Kessler Foundation Research Center; Department of Physical Medicine and Rehabilitation; New Jersey Medical School, Rutgers, the State University of New Jersey; West Orange NJ USA
3. General Internal Medicine; University of Washington; Seattle WA USA
4. Cognitive Neuroscience Division; Department of Neurology and Taub Institute for Research on Alzheimer's Disease and the Aging Brain; Columbia University; New York NY USA
5. Joseph and Kathleen Bryan Alzheimer's Disease Research Center; Duke University Medical Center; Durham NC USA
6. Department of Psychology; University of Notre Dame; Notre Dame IN USA
7. Department of Neurology; University of California, Davis, University of California, Davis Medical Center; Sacramento CA USA