1 From the Medizinische Klinik und Poliklinik I, Ludwig-Maximilians-Universität, Marchioninistrasse 15, Munich 81377, Germany (T.J.S., J.H.); DZHK (German Center for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany (T.J.S., J.H.); Department of Medical Imaging and Division of Cardiology, University of British Columbia, Vancouver, Canada (J.L.); National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Md (M.Y.C.); Department of Cardiology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany (S.A.); Department of Clinical Physiology, Nuclear Medicine and PET and Turku PET Centre, Turku University Hospital, Turku, Finland (J.K.); and Department of Cardiology, Royal Infirmary, University of Edinburgh, Edinburgh, Scotland (D.N.).