1. Department of Medicine, University of Kuopio, FI-70211 Kuopio, Finland
2. A. I. Virtanen Institute for Molecular Sciences, University of Kuopio, FI-70211 Kuopio, Finland
3. Minerva Foundation Institute for Medical Research, University of Helsinki, FI-00290 Helsinki, Finland
4. Department of Biology, University of Oulu, FI-90014 Oulu, Finland
5. National Bio-NMR Facility, A. I. Virtanen Institute for Molecular Sciences, University of Kuopio, FI-70211 Kuopio, Finland
6. Department of Pathology, University Hospital of Tampere, FI-33521 Tampere, Finland
7. Biocenter Oulu and Department of Biochemistry, University of Oulu, FI-90014 Oulu, Finland
8. The Lundberg Laboratory for Diabetes Research, Department of Internal Medicine, Sahlgrenska University Hospital, SE-41345 Göteborg, Sweden