1. Faculty of Medicine University of Oslo Oslo Norway
2. Department of Research Sunnaas Rehabilitation Hospital Nesodden Norway
3. Department of Physiology and Pharmacology, Section for Integrative Physiology Karolinska Institutet Stockholm Sweden
4. Department of Nutrition, Institute of Basic Medical Sciences University of Oslo Oslo Norway
5. Department of Haematology Oslo University Hospital Oslo Norway
6. Department of Molecular Medicine and Surgery, Section for Integrative Physiology Karolinska Institutet Stockholm Sweden