1. Department of Internal Medicine III, Cologne University Hospital – Heart Center, Cologne, Germany
2. Clinic for General and Interventional Cardiology/Angiology, Herz- und Diabeteszentrum NRW, Ruhr-Universität Bochum, Bad Oeynhausen, Germany
3. Institute for Medical Statistics and Computational Biology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Koln, Germany
4. Department of Cardiac Surgery, Cologne University Hospital – Heart Center, Cologne, Germany
5. Klinik für Innere Medizin – Kardiologie, Evangelisches Klinikum Köln Weyertal, Cologne, Germany
6. Department of Internal Medicine III, Cologne University Hospital – Heart Center, Kerpener Straße 62, Cologne 50937, Germany