1. Vanderbilt Epidemiology Center, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.
2. Division of Diabetes, Endocrinology, and Metabolism and Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.
3. Department of Epidemiology, Shanghai Cancer Institute, and Department of Epidemiology, Fudan University School of Public Health, Shanghai, People's Republic of China.
4. Division of Cardiovascular Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.