1. Department of Internal Medicine Division of Cardiology University of Pittsburgh School of Medicine and Heart & Vascular InstituteUniversity of Pittsburgh Medical Center Pittsburgh Pennsylvania
2. Department of Internal Medicine Wake Forest School of Medicine Winston‐Salem North Carolina
3. Section on Cardiology Wake Forest School of Medicine Winston‐Salem North Carolina
4. Department of Epidemiology and Prevention Epidemiological Cardiology Research Center (EPI‐CARE) Wake Forest School of Medicine Winston‐Salem North Carolina