1. Yale University School of Medicine New Haven Connecticut USA
2. Hospital Albert Einstein São Paulo Brazil
3. Universitätsklinikum Schleswig‐Holstein Kiel Germany
4. CHU Toulouse Rangueil Toulouse France
5. St.‐Johannes‐Hospital Dortmund Germany
6. Szpital Uniwersytecki w Krakowie Krakow Poland
7. REVA Medical San Diego California USA
8. Barts Heart Centre, London and Queen Mary University of London London UK