1 Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway.
2 Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway.
3 Oslo Metropolitan University, Oslo, Norway.
4 Department of Oncology, Oslo University Hospital, Oslo, Norway.
5 Department of Public Health and Nursing, Faculty of Medicine and Health Sciences, K.G. Jebsen Center for Genetic Epidemiology, NTNU, Norwegian University of Science and Technology, Trondheim, Norway.
6 Department of Endocrinology, Clinic of Medicine, St Olavs Hospital, Trondheim University Hospital, Trondheim, Norway.