1. Internal Medicine Clinic III, Cardiology, Angiology and Intensive Care Medicine Saarland University Hospital Homburg Germany
2. Division of Cardiology Duke University School of Medicine Durham NC USA
3. Duke Clinical Research Institute Duke University School of Medicine Durham NC USA
4. Division of Cardiovascular Medicine The Ohio State University Columbus OH USA
5. Department of Cardiology (CVK) of German Heart Center Charité; Institute of Health Center for Regenerative Therapies (BCRT) German Centre for Cardiovascular Research (DZHK) partner site Berlin, Charité Universitätsmedizin Berlin Germany