1. From the Departments of Cardiology (W.G.v.D., A.M.B., O.B., M.J.W.G., C.A.V., A.C.v.R.), Clinical Epidemiology and Biostatistics (J.W.R.T.), and Clinical Physics and Informatics (M.B.M.H.), VU University Medical Center, Amsterdam, the Netherlands; Department of Cardiology (F.J.t.C.), Thoraxcenter Erasmus Medical Center, Rotterdam, the Netherlands; and Department of Cardiology (J.M.t.B.), St Antonius Hospital, Nieuwegein, the Netherlands.