1. Department of Cardiology and Angiology; Hospitals and Clinics Bitterfeld-Wolfen; Bitterfeld Germany
2. Department of Cardiology, Klinikum Fulda, Fulda, Germany
3. Institute of Biomedical Engineering; University of Rostock; Germany
4. UMBC Laboratory for Implantable Materials and Biomechanics; University of Maryland, Baltimore County; Baltimore Maryland