1. Brigham and Women's Hospital; 75 Francis Street Boston MA 02445 USA
2. Rigshospitalet; University of Copenhagen; Copenhagen Denmark
3. Duke University Medical Center; Durham NC USA
4. Associazione Nazionale Medici Cardiologi Ospedalieri Research Center; Florence Italy
5. Glasgow Royal Infirmary; Glasgow Scotland, UK
6. University of Glasgow; Glasgow Scotland, UK