1. From the Interdisciplinary Stem Cell Institute (B.A.T., W.B., J.M.H.), Department of Surgery (B.A.T.), and Department of Medicine (W.B., J.M.H.), University of Miami Miller School of Medicine, FL; Department of Cardiology, Medical University of Vienna, Austria (J.W., M.G., G.G.); Hospital General Universitario Gregorio Marañón, Instituto de Investigación Sanitaria Gregorio Marañón, Universidad Complutense, Madrid, Spain (F.F.-A.); and CIBERCV, ISCIII, Madrid, Spain (F.F.-A.).