1. Department of Family, Community and Health Systems, University of Alabama at Birmingham, Birmingham, AL, USA
2. Department of Medicine, University of Mississippi Health Care, Jackson, MS, USA
3. School of Nursing, University of Mississippi Medical Center, Jackson, MS, USA
4. Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
5. Department of Behavioral Sciences and Health Education, Emory University, Atlanta, GA, USA
6. Department of Medicine, University North Carolina at Chapel Hill, Chapel Hill, NC, USA
7. Department of Epidemiology, Johns Hopkins University, Baltimore, MD, USA
8. Department of Epidemiology, University of Alabama at Birmingham, Birmingham, AL, USA
9. Department of Health Behavior, University of Alabama at Birmingham, Birmingham, AL, USA