[1] Harvard Medical School,PERFUSE Study Group, Cardiovascular Division, Departments of Medicine, Beth Israel Deaconess Medical Center
[2] Harvard Medical School,Cardiology Division, Massachusetts General Hospital
[3] Harvard Medical School,Cardiovascular Division, Brigham and Women’s Hospital
[4] Duke University and Duke Clinical Research Institute,Division of Cardiology, R.A.H Faculty of Medicine
[5] University of Calgary,Department of Haematological Medicine, Guy’s and St Thomas’ Hospitals
[6] Portola Pharmaceuticals Inc.,Division of Cardiovascular Medicine, Department of Medicine
[7] King’s College,undefined
[8] Stanford University,undefined