1. Clinical Immunology Unit, Department of Internal Medicine, Stavanger University Hospital,
2. Clinical Immunology Unit, Department of Internal Medicine, Stavanger University Hospital
3. Department of Pathology, Stavanger University Hospital, Stavanger, Norway
4. Division of Renal Pathology and Electron Microscopy, Department of Pathology, Haukeland University Hospital, Bergen, Norway
5. Clinical Immunology Unit, Department of Internal Medicine, Stavanger University Hospital, Institute of Internal Medicine, The Faculty of Medicine and Dentistry, University of Bergen, Norway