1. Cardiology Clinical Academic Group, St George’s University Hospitals’ NHS Foundation Trust and Molecular and Clinical Sciences Institute, St George’s University of London, United Kingdom (C.M., G.F., M.P., B.G., J.W., B.E., J.B., G.P.-W., E.P. C.P., A.M., A.A., M.T., S.S., E.R.B., M.N.S.).
2. Department of Pathology, Royal Brompton and Harefield NHS Foundation Trust, Imperial College London, United Kingdom (J.L.R.).
3. National Heart and Lung Institute & MRC London Institute of Medical Sciences, Imperial College London, and Royal Brompton and Harefield NHS Foundation Trust, United Kingdom (J.S.W., S.A.C.).
4. Institute of Infection and Immunity, St George’s University of London, United Kingdom (A.W., I.C.S.).