1. Herzzentrum Segeberger Kliniken GmbH Bad Segeberg Germany
2. Heartcenter OLVG Amsterdam The Netherlands
3. Klinik für Innere Med. I SRH Zentralklinikum Suhl gGmbH Suhl Germany
4. Hospital Privé Jacques Cartier Massy France
5. Department of Cardiology Okinawa Tokushukai Shonan Kamakura General Hospital Kamakura Japan
6. Piedmont Heart Institute Atlanta Georgia USA
7. Catharina Hospital Eindhoven The Netherlands