1. Division of Cardiovascular Medicine, Department of Medicine, Beth Israel Deaconess Medical Center; Harvard Medical School; Boston Massachusetts
2. Baim Institute for Clinical Research; Boston Massachusetts
3. Duke University and Duke Clinical Research Institute; Durham North Carolina
4. Division of Cardiology, Faculty of Medicine; University of Calgary; Alberta Canada
5. Department of Haematological Medicine; Guy's and St Thomas’ Hospitals, King's College; London United Kingdom
6. Division of Cardiovascular Medicine, Department of Medicine; Stanford University; Stanford California
7. Division of Cardiovascular Medicine; Brigham and Women's Hospital, Harvard Medical School; Boston Massachusetts