1. Universitätsklinikum des Saarlandes; Klinik für Innere Medizin III Homburg/Saar Germany
2. Division of Cardiovascular Medicine; The Howard Gilman Institute for Heart Valve Diseases and the Schiavone Institute for Cardiovascular Translational Research; SUNY Downstate Medical Center Brooklyn and New York, NY USA
3. Division of Clinical Sciences; St George's University of London; London UK
4. Robertson Centre for Biostatistics; University of Glasgow; Glasgow UK
5. Groupe Hospitalier Pitie-Salpetriere; Faculte de medicine Paris France
6. Maria Cecilia Hospital, GVM Care & Research; E.S. Health Science Foundation; Cotingola Italy
7. Cardiovascular Institute Montreal; Canada
8. University Clinic Golnik; Division of Cardiology; Slovenia
9. Department of Molecular and Clinical Medicine, Sahlgrenska Academy; University of Gothenburg, Sweden and National Heart and Lung Institute, Imperial College; London