1. Corporal Michael J. Crescenz VA Medical Center, Philadelphia, Pennsylvania
2. University of Pennsylvania School of Nursing, Philadelphia, Pennsylvania
3. University of Iowa College of Nursing, Iowa City, Iowa
4. Tuscaloosa VA Medical Center, Tuscaloosa, Alabama
5. Alabama Research Institute on Aging and Department of Psychology, University of Alabama, Tuscaloosa, Alabama
6. Division of Gerontology, Geriatrics, and Palliative Care, University of Alabama at Birmingham, Birmingham, Alabama
7. The Mountain-Whisper-Light Statistics, Seattle, Washington
8. Northwestern University Feinberg School of Medicine, Chicago, Illinois
9. Washington University, St. Louis, Missouri, USA