Department of Cardiology, Universitätsmedizin Berlin, Campus Virchow Klinikum (CVK), Berlin, Germany. Berlin Center for Regenerative Therapies (BCRT), Campus Virchow Klinikum (CVK), Berlin, Germany. DZHK (German Centre for Cardiovascular Research), partner site Berlin, Berlin, Germany. Department of Neurology, Universitätsmedizin Berlin, CVK, Berlin, Germany. Medical College of Wisconsin, Milwaukee, WI, USA. Cardiovascular Research Foundation, New York, NY, USA. Department of Cardiovascular Physiology, Ruhr University Bochum, Bochum, Germany.