1. HELIOS Clinic for Cardiac Surgery Karlsruhe Karlsruhe Germany
2. Medical Clinic III ‐ Department of CardiologyViDia Clinics, Sankt Vincentius Hospital Karlsruhe Karlsruhe Germany
3. Medical Clinic IV ‐ Department of CardiologyMunicipal Hospital Karlsruhe, Academic Teaching Hospital of the University of Freiburg Karlsruhe Germany