1. Universitätsklinikum des Saarlandes; Homburg Saar Germany
2. Herzzentrum Leipzig; Germany
3. Werner Forßmann Krankenhaus; Eberswalde Germany
4. Ernst Von Bergmann Klinikum; Potsdam Germany
5. Instituto Dante Pazzanese De Cardiologia; Sao Paulo Brazil
6. John Muir Cardiovascular Institute; Concord California
7. Experimentelle Radiologie; Charite Berlin Germany
8. Columbia University and Cardiovascular Research Foundation; New York New York