1. Deutsches Herzzentrum Berlin (DHZB), Berlin, Germany
2. Deutsches Zentrum für Herz-Kreislaufforschung (DZHK), partner site Berlin, Berlin, Germany
3. Berlin Center for Regenerative Therapies (BCRT), Berlin, Germany
4. Department of Cardiovascular Surgery, Charité Universitätsmedizin Berlin, Berlin, Germany
5. Institute for Regenerative Medicine, University of Zurich, Zurich, Switzerland