1. From the Departments of Cardiology (L.S., N.I., A.T.N., N.T.O., O.W.F., T.E.) and Cardiothoracic Surgery (D.A.S., P.S.O., H.G.H.T.), The Heart Centre, Rigshospitalet, Copenhagen University Hospital, Denmark; Departments of Cardiology (H.N.) and Cardiothoracic and Vascular Surgery (B.J.K.), Odense University Hospital, Denmark; Department of Cardiology, Sahlgrenska University Hospital, Gothenburg, Sweden (P.P.); Department of Statistics, Medtronic, Mounds View, MN (Y.C.); and Department of Medicine,...