1. Joslin Diabetes Center and Harvard Medical School, Boston, MA
2. KG Jebsen Center for Diabetes Research, Department of Clinical Science, University of Bergen, Bergen, Norway
3. Gade Laboratory for Pathology, Department of Clinical Medicine, University of Bergen, Bergen, Norway
4. Department of Pathology, Haukeland University Hospital, Bergen, Norway
5. Department of Pediatrics and Adolescent Medicine, Haukeland University Hospital, Bergen, Norway