1. University of North Carolina School of Medicine Chapel Hill NC
2. Department of Epidemiology Gillings School of Global Public Health University of North Carolina at Chapel Hill NC
3. Division of Cardiology University of North Carolina School of Medicine Chapel Hill NC
4. Division of Cardiology Massachusetts General Hospital Boston MA
5. Department of Medicine Campbell University School of Osteopathic Medicine Lillington NC
6. Heart and Vascular Center Ohio State Wexner Medical Center Columbus OH