1. Division of Cardiology, Medstar Heart and Vascular Institute, Georgetown University/Washington Hospital Center, Washington, USA
2. Division of Cardiology, Baylor Scott and White Health, Temple, USA
3. Department of Medicine, Massachusetts General Hospital, USA
4. Division of Cardiothoracic Surgery, The Cardiovascular Center, Tufts Medical Center, Boston, USA
5. Division of Cardiology, The Cardiovascular Center, Tufts Medical Center, Boston, USA