1. Durham Veterans Affairs Geriatric Research Education and Clinical Center; Durham Veterans Affairs Medical Center (VAMC); Durham North Carolina
2. Department of Medicine; Duke University; Durham North Carolina
3. The University of Texas School of Public Health; Houston Texas
4. Center for Study of Aging and Human Development; Duke University; Durham North Carolina
5. Deptartment of Biostatistics and BioInformtics; Duke University; Durham North Carolina
6. Division of Cardiovascular Sciences; National Heart, Lung, and Blood Institute of the National Institutes of Health; Bethesda Maryland
7. Department of Medicine; University of Alabama at Birmingham; Birmingham Alabama
8. Department of Epidemiology; University of Alabama at Birmingham; Birmingham Alabama