1. From the Centre for Cardiovascular Science (M.R.D., W.S.A.J., A.T.V., M.A.H.P., C.W.L.C., T.S.M., W.J.A.C., V.T., R.P., N.A.B., D.E.N.) and Clinical Research Imaging Centre (M.R.D., W.S.A.J., A.T.V., C.W.L.C., H.R., A.F., E.J.R.v.B., D.E.N.), University of Edinburgh, Edinburgh, UK; Department of Pathology, Royal Infirmary of Edinburgh, Edinburgh, UK (W.A.W.); and Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (J.H.F.R.).