1. Department of Cardiology; University Medical Center Groningen; Hanzeplein 1 9713 GZ Groningen The Netherlands
2. Momentum Research Inc.; Durham NC USA
3. Duke Clinical Research Institute; Durham NC USA
4. Heart Disease Center; 4th Military Clinical Hospital; Wroclaw Poland
5. Corthera; San Mateo CA USA
6. University of California; San Francisco CA USA
7. University of California; San Diego CA USA
8. Athens University Hospital; Athens Greece
9. University of Brescia; Brescia Italy