1. From the Institute of Clinical Medicine (E.P., K.E., J.E., K.G., S.K.), University of Oslo, Norway
2. Department of Cardiology, Oslo University Hospital, Ullevål, Norway (E.P., J.M., K.E., J.B., K.G., S.K., I.G., E.B.).
3. Department of Informatics (K.L.), University of Oslo, Norway