1. From the National Institute of Health Research Cardiovascular Biomedical Research Unit, Department of Cardiology, Royal Brompton Hospital, London, United Kingdom (H.C.P., C.H., A.R.L., C.d.M.); Faculty of Medicine, National Heart and Lung Institute, Imperial College, London, United Kingdom (H.C.P., C.H., S.D.R., A.R.L., D.P.F., C.d.M.); Department of Outcomes Research, St. George’s Vascular Institute, St George’s University, London, United Kingdom (B.A.O.); Department of Cardiology, Ealing Hospital...