1. Cardiology Clinical Academic Group, St George’s, University of London, United Kingdom(A.M., M.P., S.S.).
2. Division of Cardiovascular Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, United Kingdom(A.M., C.M., B.K.).
3. Manchester University National Health ServiceFoundation Trust, Manchester Academic Health Science Centre, United Kingdom(A.M., V.P., C.M., B.K.).
4. Research Institute for Sports and Exercise Science, Liverpool John Moore’s University, United Kingdom(D.O.).
5. Beth Israel Deaconess Medical Centre, Harvard Medical School, Boston, MA(P.R.).
6. Cardiothoracic Centre, Guy’s and St Thomas’ Hospital, London, United Kingdom(G.F.).
7. Department of Cardiology, Glenfield Hospital, Leicester, United Kingdom(H.D.).