Carsten Tschöpe1,2,3, Javier Díez4,5,6,7. 1. Berlin-Brandenburg Center for Regenerative Therapies, Berlin, Germany. 2. Department of Cardiology, Charité, University Medicine Berlin, Campus Virchow Klinikum, Berlin, Germany. 3. DZHK (German Center for Cardiovascular Research), Partner Site, Berlin, Germany. 4. Program of Cardiovascular Diseases, Centre for Applied Medical Research, University of Navarra, Pamploma, Spain. 5. Departments of Nephrology and Cardiology and Cardiac Surgery, University of Navarra Clinic, Pamploma, Spain. 6. Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamploma, Spain. 7. CIBERCV, Carlos III Institute of Health, Madrid, Spain.