1. Veterans Affairs Eastern Colorado and Health Care System, Denver2Department of Medicine, University of Colorado School of Medicine, Aurora
2. Duke Clinical Research Institute, Durham, North Carolina
3. Department of Medicine, Duke University School of Medicine, Duke Clinical Research Institute, Durham, North Carolina
4. Department of Biostatistics and Bioinformatics, Duke University School of Medicine, Durham, North Carolina
5. Department of Medical Sciences, Cardiology, Uppsala Clinical Research Center, Uppsala University, Uppsala, Sweden
6. Division of Cardiology, University of Alberta, Edmonton, Canada
7. Department of Medicine, Stanford University, Stanford, California
8. Green Lane Cardiovascular Service, Auckland City Hospital, Auckland, New Zealand
9. Department of Cardiology, University of Leuven, Leuven, Belgium
10. South Australian Health and Medical Research Institute, Flinders University and Medical Centre, Adelaide, Australia
11. Gill Heart Institute and Division of Cardiovascular Medicine, University of Kentucky, Lexington