1. Cardiology and Vascular Medicine Service, VA Boston Healthcare System, Boston, MA, USA
2. Department of Medicine, Harvard Medical School, Boston, MA, USA
3. Department of Medicine, Boston University School of Medicine, Boston, MA, USA
4. Department of Medicine, Brown University, Providence, RI, USA
5. Division of Cardiology, Providence VA Medical Center, Providence, RI, USA
6. Division of Cardiology, Department of Medicine, Columbia University, New York, NY, USA
7. Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
8. Department of Medicine, Brigham and Women’s Hospital, Boston, MA, USA
9. Corrigan Minehan Heart Center, Massachusetts General Hospital, Boston, MA, USA