1. Department of Medical Genetics; University of Oslo and Oslo University Hospital; Oslo Norway
2. Institute for Experimental Medical Research; Oslo University Hospital and University of Oslo; Oslo Norway
3. Department of Hematology; Oslo University Hospital; Oslo Norway
4. Department of Neurology; Nakamura Memorial Hospital; Sapporo Japan
5. CHRU, Hôpital Gui de Chauliac; Montpellier France
6. Service d’Anatomie Pathologique et Neuropathologie; Hôpital de la Timone; Assistance Publique Hopitaux de Marseille; Marseille France
7. Department for Microbiology; Oslo University Hospital; Oslo Norway
8. Department for Medical Biochemistry; Oslo University Hospital; Oslo Norway
9. Konvallveien 4; N-1338 Sandvika Oslo Norway
10. Institute of Clinical Medicine; University of Oslo; Oslo Norway