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