1. Duke University Hospital, Medicine, Division of Cardiology; 2301 Erwin Road Durham NC 27713 USA
2. Duke Clinical Research Institute; Durham NC USA
3. University of Brescia; Brescia Italy
4. Momentum Research; Durham NC USA
5. National Heart and Lung Institute, Imperial College London (Royal Brompton & Harefield Hospitals) and Department of Cardiology; Castle Hill Hospital, University of Hull; Kingston-upon-Hull UK
6. Merck Research Laboratories; Rahway NJ USA
7. University of Iowa Carver College of Medicine Cardiovascular Research Center; Iowa City IA USA
8. Medical University; Military Hospital; Wroclaw Poland
9. Brigham and Women's Hospital; Boston MA USA
10. University of Groningen; Groningen the Netherlands
11. University of California at San Francisco (SF) and SF Veterans Affairs Medical Center; SF, CA USA