1. Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School; Boston MA USA
2. Department of Cardiology; Rigshospitalet; Copenhagen Denmark
3. Department of Medical Statistics; London, School of Hygiene & Tropical Medicine; London UK
4. Department of Medicine; McMaster University; Ontario Canada
5. Department of Molecular and Clinical Medicine; University of Gothenburg; Gothenburg Sweden
6. National Heart and Lung Institute; Imperial College London; London UK
7. Institute of Cardiovascular and Medical Sciences; University of Glasgow; Glasgow UK
8. Department of Medicine; Duke University; Durham NC USA