1. Section of Cardiology, Department of Medicine University of Texas at Austin Dell Medical School Austin Texas USA
2. Section of Cardiology, Department of Medicine Baylor College of Medicine Houston Texas USA
3. Department of Medicine, Division of Hospital Medicine Johns Hopkins School of Medicine Baltimore Maryland USA
4. Department of Medicine, Division of Hospital Medicine University of Texas Southwestern Houston Texas USA
5. Section of General Internal Medicine, Department of Medicine Baylor College of Medicine Houston Texas USA