1. From the International Centre for Circulatory Health, NHLI, Imperial College London, London, United Kingdom (N.F., S.S., S.N., R.P., C.K., D.P.F., J.E.D., P.W.S.); National Heart Centre Singapore, Singapore (N.F., P.W.); ThoraxCenter, Erasmus Medical Center, Rotterdam, The Netherlands (J.L.G.-C., S.N., C.V.B., Y.O., H.M.G.-G., P.W.S.); Ludwig-Maximilian Universität, München, Germany (J.L.G.-C.); Department of Mechanical Engineering, University College London, London, United Kingdom (R.T.); NIHR, BRU...