1. Division of Cardiology, Department of Internal Medicine University of Texas Southwestern Dallas TX USA
2. Section of Interventional Cardiology and Vascular Medicine Northshore University Healthsystem Chicago IL USA
3. Division of Cardiology University of North Carolina School of Medicine Chapel Hill NC USA
4. Divsion of Cardiology, Duke University School of Medicine Duke Clinical Research Institute Durham NC USA
5. Division of Cardiovascular Medicine Brigham and Women's Hospital Boston MA USA
6. Joint Department of Biomedical Engineering University of North Carolina and North Carolina State University Chapel Hill NC USA