1. Departments of Cardiology (I.A.W.v.R., Y.M.P., H.L.T., A.A.M.W.), Genetics (E.A.N., R.H.L.d.D., I.C.), and Epidemiology (A.H.Z.), Academic Medical Center, Amsterdam, The Netherlands; Departments of Genetics (P.A.v.d.Z., J.D.H.J., J.P.v.T.) and Cardiology (R.A.d.B., M.P.v.d.B.), University of Groningen, University Medical Center Groningen, Groningen, The Netherlands; Interuniversity Cardiology Institute of the Netherlands, Utrecht, The Netherlands (J.A.G., Y.M.P., R.N.W.H., A.A.M.W.); Departments of...