1. From the Department of Cardiology, Oslo University Hospital, Ullevaal, Norway (I.G., P.T.S., K.E., K.G., S.E.K., H.A., J.B.); Center for Clinical Heart Research, Oslo University Hospital, Norway (I.G., H.A.); Faculty of Medicine (I.G., P.T.S., K.G., S.E.K., H.A., J.E.), Department of Informatics, University of Oslo, Norway (K.L.); and Department of Cardiology, Oslo University Hospital, Rikshospitalet, Norway (G.E.).