1. Division of Cardiology, Department of Medicine Northwestern University Feinberg School of Medicine Chicago Illinois
2. Department of Internal Medicine University of Pittsburgh Medical Center Pittsburgh Pennsylvania
3. Heart and Vascular Institute University of Pittsburgh Medical Center Pittsburgh Pennsylvania
4. Infectious Diseases Epidemiology Research Unit, School of Medicine and Graduate School of Public Health University of Pittsburgh Pittsburgh Pennsylvania
5. Division of Infectious Diseases, Department of Medicine University of Pittsburgh Medical Center Pittsburgh Pennsylvania