1 Department of Cardiology, Division of Medicine, Akershus University Hospital, Lørenskog, Norway; and the K.G. Jebsen Center for Cardiac Biomarkers, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway.
2 Department of Cardiology, Division of Medicine, Akershus University Hospital, Lørenskog, Norway; and the K.G. Jebsen Center for Cardiac Biomarkers, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway. Electronic address: torbjorn.omland@medisin.uio.no.