1. Manchester Heart Centre, Manchester Royal Infirmary, Manchester University NHS Foundation Trust, UK (M.J.D.).
2. Division of Cardiovascular Sciences, Manchester Academic Health Sciences Centre (M.J.D.), University of Manchester, UK.
3. Division of Cell Matrix Biology and Regenerative Medicine (M.J.D.), University of Manchester, UK.
4. Cardiovascular Division, Department of Medicine, University of Miami Miller School of Medicine, FL (M.G.C.).
5. Division of Cardiology, Department of Internal Medicine, UT Southwestern Medical Center, Dallas, TX (A.A.B., D.J.K.).