1. VA San Diego Healthcare System; United States
2. University of California; San Diego United States
3. University Hospital Basel; Switzerland
4. University of North Carolina; Chapel Hill United States
5. Charite, Campus Virchow-Klinikum; Berlin Germany
6. San Spirito Hospital; Rome Italy
7. Castle Hill Hospital, University of Hull; Kingston-upon-Hull UK
8. Hopital Lariboisiere; Paris France
9. Linkoping University Hospital; Linkoping Sweden
10. Sant'Andrea Hospital University La Sapienza; Rome Italy
11. Athens University Hospital Attikon; Athens Greece
12. University of California; Los Angeles United States
13. Paris Descartes University; Paris France
14. Department of Cardiology, Pitie Salpetriere Hospital; University Pierre & Marie Curie, Paris 6; Paris France
15. University of Toronto; Canada
16. Royal Brompton Hospital; London UK
17. St. Vincents University Hospital; Dublin Ireland
18. University Paris 7 Diderot, Hopital Lariboisiere; Paris France
19. Helsinki University Central Hospital; Helsinki Finland
20. The Cleveland Clinic; Cleveland Ohio United States
21. San Filippo Neri Hospital; Rome Italy
22. Centro per lo Scompenso Ospedale Civile; San Dona di Piave Italy
23. Onze Lieve Vrouwe Ziekenhuis; Aalst Belgium
24. Baylor University Medical Center; Dallas Texas United States
25. Inserm Centre d'Investigation Cliniques; Nancy France
26. Brigham and Women's Hospital; Boston Massachusetts United States