1. Department of Family Medicine and Community Health, Duke University School of Medicine, Durham, North Carolina
2. Center for Novel and Exploratory Clinical Trials, Yokohama City University, Yokohama, Japan
3. Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill
4. Durham Veterans Affairs Health System and Department of Medicine, Duke University School of Medicine, Durham, North Carolina
5. Maine General Internal Medicine, Waterville
6. Department of Medicine, Division of General Internal Medicine and Clinical Epidemiology, University of North Carolina at Chapel Hill
7. Research Triangle Park, Durham, North Carolina
8. North Carolina Translational and Clinical Sciences Institute, University of North Carolina at Chapel Hill
9. Department of Medicine, Columbia University Irving Medical Center, New York, New York
10. Department of Epidemiology, University of Alabama at Birmingham
11. Department of Family Medicine, University of North Carolina at Chapel Hill
12. Sheps Center for Health Services Research, University of North Carolina at Chapel Hill
13. Department of Medicine, Division of Cardiology, University of North Carolina at Chapel Hill
14. now with Department of Internal Medicine, Division of General Internal Medicine, The Ohio State University