Institution: | a Department of Internal Medicine, Division of Cardiology, University of Texas Southwestern, Dallas, Texas b Department of Internal Medicine, Rush University, Chicago, Illinois c Department of Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania d Department of Internal Medicine, Division of Cardiology, New York University Medical Center, New York, New York e Department of Internal Medicine, Division of Cardiology, University of New Mexico, Albuquerque, New Mexico f Department of Internal Medicine, Division of Cardiology, Hospital of the University of Pennsylvania, Philadelphia g Cardiovascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania |