1. From the Department of Cardiovascular Medicine, University of Oxford, Oxford, UK (M.M., A.S.A., J.D., R.L., S.R., P.C., C. Shirodaria, S.J., R.P.C., B.C., K.M.C., C.A.); Department of Cardiac Surgery, John Radcliffe Hospital, Oxford, UK (R.S., M.P., R.D.S.); and Department of Cardiology, Athens University Medical School, Athens, Greece (M.D., C.B., D.T., C. Stefanadis).