1. Geriatrics and Extended Care, Salem Veterans Affairs Medical Center, Salem, VA, USA
2. Department of Health & Human Performance, Concordia University Chicago, Chicago, IL, USA
3. Baltimore Geriatric Research, Education, and Clinical Center (GRECC), The Veterans Affairs Maryland Health Care System, Baltimore, MD, USA
4. Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
5. Department of Medicine, Virginia Tech Carilion School of Medicine, Roanoke, VA, USA