1. Department of Epidemiology, University of Alabama at Birmingham, Birmingham, Alabama.
2. Department of Health Behavior, University of Alabama at Birmingham, Birmingham, Alabama.
3. Department of Biostatistics, School of Public Health, University of Alabama at Birmingham, Birmingham, Alabama.
4. Department of Medicine, School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama.
5. School of Nursing, University of Alabama at Birmingham, Birmingham, Alabama.