1. Department of Cardiology; University of Groningen, University Medical Centre Groningen; Hanzeplein 1 9713 GZ Groningen the Netherlands
2. Department of Epidemiology; University of Groningen, University Medical Centre Groningen; Groningen the Netherlands
3. Imperial College; London UK
4. Duke University Medical Center; Durham NC USA
5. University of Brescia; Brescia Italy
6. Medical University; Clinical Military Hospital; Wroclaw Poland
7. University of California at San Francisco and San Francisco Veterans Affairs Medical Center; San Francisco CA USA
8. Momentum Research; Durham NC USA
9. Brigham and Women's Hospital; Boston MA USA
10. Merck Research Laboratories; Rahway NJ USA
11. Abboud Cardiovascular Research Center; University of Iowa Carver College of Medicine; Iowa USA