1. Department of Internal Medicine, Beth Israel Deaconess Medical Center Harvard Medical School Boston Massachusetts USA
2. Department of Internal Medicine, Brigham and Women's Hospital Harvard Medical School Boston Massachusetts USA
3. Yale University School of Nursing Orange Connecticut USA
4. Department of Medicine, Division of Cardiology, Beth Israel Deaconess Medical Center Harvard Medical School Boston Massachusetts USA
5. Department of Medicine, Division of Cardiovascular Medicine, Brigham and Women's Hospital Harvard Medical School Boston Massachusetts USA