1. Birmingham/Atlanta Geriatric Research, Education, and Clinical Center (GRECC), Department of Veterans Affairs, Birmingham, Alabama, and Atlanta, Georgia.
2. Department of Medicine, School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama.
3. School of Nursing, University of Alabama at Birmingham, Birmingham, Alabama.
4. Department of Biostatistics, School of Public Health, University of Alabama at Birmingham, Birmingham, Alabama.
5. University of Alabama, Tuscaloosa, Alabama.
6. Department of Medicine, University of Colorado, Denver, Colorado.