1. Department of Medical Biochemistry, Oslo University Hospital, Ullevaal, Oslo, Norway;
2. Institute of Clinical Medicine, University of Oslo, Oslo, Norway;
3. Department of Life Sciences and Health, OsloMet (Oslo Metropolitan) University, Oslo, Norway;
4. Department of Endocrinology, Aalesund Hospital, Aalesund, Norway;
5. Department of Medical Biochemistry, Aalesund Hospital, Aalesund, Norway;
6. Department of Biological Sciences, Norwegian University of Science and Technology, Aalesund, Norway