1. From the Division of Experimental Surgery, Department of Cardiovascular Surgery, German Heart Center Munich, Germany (S.A.D., M.-A.D., E.D., R.L., M.K.); Stanford Cardiovascular Institute (V.S., G.L., E.D., S.M.W.), Institute for Stem Cell and Regenerative Medicine (S.M.W.), and Division of Cardiovascular Medicine, Department of Medicine (S.M.W.), Stanford University School of Medicine, CA; DZHK (German Center for Cardiovascular Research), partner site Munich Heart Alliance, Germany (M.-A.D., M.K.).