1. From the British Heart Foundation Cardiovascular Sciences Unit (S.C., K.V.d.H., M.Z., H.C., L.A.L., J.C.M., D.O.H., P.C.E.), National Heart and Lung Institute; Department of Bioengineering (S.C., R.K.); Kennedy Institute of Rheumatology (D.S., I.U.); Medical Research Council Clinical Sciences Centre (J.L.T., M.K., W.G.), Biological Imaging Centre; and Division of Investigative Sciences (H.J.), Imperial College London, United Kingdom.