1. VA Maryland Health Care System, Baltimore VA Medical Center, Division of Gerontology and Geriatric Medicine, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland.
2. Baltimore VA Medical Center, Geriatric Research, Education and Clinical Center (GRECC), VA Maryland Health Care System, Baltimore, Maryland.
3. Division of Infectious Disease, Department of Medicine, Virginia Tech Carilion School of Medicine, Roanoke, Virginia.
4. Salem Veterans Affairs Medical Center, Salem, Virginia.