1. Geriatric Research, Education, and Clinical Center, VA Medical Center, Durham, North Carolina USA
2. University of North Carolina School of Medicine, Chapel Hill, North Carolina USA
3. Center for the Study of Aging/Claude D. Pepper Older Americans Independence Center, Duke University Medical Center, Durham, North Carolina USA
4. Department of Medicine, Duke University Medical Center, Durham, North Carolina USA
5. Geriatric Research, Education, and Clinical Center, VA Healthcare System, Miami, Florida USA
6. Division of Epidemiology, Division of Geriatric Medicine, University of Miami Miller School of Medicine, Miami, Florida USA
7. Geriatric Research, Education, and Clinical Center, Greater Los Angeles VA Healthcare System, Los Angeles, California USA
8. David Geffen School of Medicine at the University of California, Los Angeles, California USA
9. Geriatric Research and Education Clinical Center, Baltimore VA Medical Center, Baltimore, Maryland
10. Gerontology and Geriatric Medicine, Department of Medicine, University of Maryland School of Medicine and Geriatric Research and Education Clinical Center, Baltimore, Maryland USA