1. Division of Medicine, Akershus University Hospital, Lørenskog, Norway;
2. Center for Heart Failure Research, University of Oslo, Oslo, Norway;
3. Center for Clinical Heart Research, Oslo University Hospital, Oslo, Norway;
4. Department of Medical Sciences, Uppsala University, Uppsala, Sweden;
5. Division of Intensive Care Medicine, Department of Anesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland;
6. Bioinformatics core facility, Oslo University Hospital and the University of Oslo, Oslo, Norway;
7. Institute for Experimental Medical Research, Oslo University Hospital, Oslo, Norway;
8. Department of Intensive Care Medicine, Bern University Hospital, University of Bern, Bern, Switzerland