Affiliation: | 1. Department of Medicine, Duke Clinical Research Institute, Duke University Medical Center, Durham, North Carolina;2. Division of Cardiology, Department of Medicine, Duke University Medical Center, Durham, North Carolina;3. Division of Cardiology, Wexner Medical Center at the Ohio State University, Columbus, Ohio;4. Division of Cardiology, Pennsylvania State University, State College, Pennsylvania;5. Division of Cardiology, University of Pittsburgh, Pittsburgh, Pennsylvania;6. Division of Cardiology, Brigham and Women's Hospital, Boston, Massachusetts, USA |