1. Department of Biomedical Imaging Science, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (C.E.D.S., M.F.P., L.A.E.B., J.G., P.G.C., A.D., T.P.C., A.C., A.K., E.L., E.D., K.K.W., J.P.G., S.P., P.P.S.).
2. Department of Cardiology, Leeds Teaching Hospitals NHS Trust, United Kingdom (A.S.).
3. Department of Cardiology, Mid Yorkshire Hospitals NHS Trust, Wakefield, West Yorkshire, United Kingdom (H.W.).
4. Department of Infection, Immunity & Cardiovascular Disease, University of Sheffield, United Kingdom (P.G.).