1. Department of Electrical and Information Engineering, Digital Signal Processing and System Theory Group, Kiel University, Kiel, Germany
2. Inorganic Functional Materials Chair, Institute for Materials Science, Kiel University, Kiel, Germany
3. Medical Department III specialized in Cardiology and Angiology, University Hospital Schleswig-Holstein, Kiel, Germany
4. Internal Medicine III specialized in Heart, Vascular and Lung, University Medical Center Heidelberg, Heidelberg, Germany
5. Department of Electrical and Information Engineering, Chair of Microwave Engineering, Kiel University, Kiel, Germany