Affiliation: | 1. Division of Cardiology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois;2. Brigham and Women''s Heart & Vascular Center, Harvard Medical School, Boston, Massachusetts;3. Division of Cardiology, Duke University Medical Center, Durham, North Carolina;4. Department of Medicine, University of Mississippi Medical Center, Jackson, Mississippi;5. Department of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota |