1. Kaiser Permanente of Georgia and the Division of Endocrinology, Emory University School of Medicine, Atlanta, Georgia;
2. Department of Biostatistics, Rollins School of Public Health, Emory University, Atlanta, Georgia;
3. Department of Geriatrics, Johns Hopkins Medical Institutions, Baltimore, Maryland;
4. Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California;
5. Department of Preventive Medicine, University of Tennessee Health Science Center, Memphis, Tennessee;
6. Center for Aging and Population Health, University of Pittsburgh, Pittsburgh, Pennsylvania;
7. Geriatric Epidemiology Section, Laboratory of Epidemiology, Demography, and Biometry, National Institute on Aging, Bethesda, Maryland.