1. Department of Medicine, Virginia Tech Carilion School of Medicine, Roanoke, Virginia.
2. Salem Veterans Affairs Medical Center, Salem, Virginia.
3. Department of Medicine, University of Virginia School of Medicine, Charlottesville, Virginia.
4. Baltimore Veterans Affairs Medical Center Geriatric Research, Education, and Clinical Center at the VA Maryland Health Care System, Baltimore, Maryland.
5. Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland.