1. Cardiovascular Institute Dedinje Belgrade Belgrade Serbia
2. Medical University Vienna Vienna Austria
3. Berlin Heals Berlin Germany
4. Charité — Universitätsmedizin Berlin Berlin Germany
5. SciRent Clinical Research and Science Belgrade Serbia
6. Clinical Research Organization Kottmann Hamm Germany
7. University Hospital Medical Center Bezanijska Kosa Belgrade Belgrade Serbia
8. School of Medicine University of Belgrade Belgrade Serbia
9. Hannover Medical School Hannover Germany
10. Advanced Cardiac and Pulmonary Vascular Disease Programs Jefferson Heart Institute Philadelphia PA USA