1. Department of Biochemistry, Institute of Basic Medical Sciences, Faculty of Medicine, and
2. Centre for Molecular Medicine Norway, Nordic European Molecular Biology Laboratory Partnership, University of Oslo, Oslo, Norway;
3. Department of Medical Biochemistry, Institute of Clinical Biochemistry, Oslo University Hospital, Rikshospitalet, Oslo, Norway; and
4. Department of Hematology, Aarhus University Hospital, Aarhus, Denmark