From the University of Aberdeen (D.K.D.), Aberdeen, UK; ERESA-Cardiac Imaging Unit (A.M.M.), Valencia, Spain; Leicester Royal Infirmary (V.J.R.), Leicester, UK; Clinical Research Facility (C.G.), Western General Hospital and University of Edinburgh, Edinburgh, UK; National Heart and Lung Institute, Imperial College, London, UK (D.J.P.); and Royal Brompton Hospital and the National Heart and Lung Institute, Imperial College, London, UK (P.J.K.). (At 2011-03)