1. Cardiovascular Clinical Academic Group and Cardiology Research Centre, St. George’s, University of London, St. George’s University Hospitals NHS Foundation Trust, United Kingdom (R.T.B., G.F., J.W., N.C., E.R.B., M.P., S.S., M.N.S.).
2. Hull University Teaching Hospitals NHS Trust, Kingston-upon-Hull, United Kingdom (R.T.B.).
3. Cardiovascular Pathology Department, St George’s, University of London, United Kingdom (J.W., M.N.S.).