1. Research Institute of Internal Medicine, Oslo University Hospital, Postbox 4950, 0424 Oslo, Norway
2. KG Jebsen Centre for B Cell Malignancies, University of Oslo, Postbox 4950, 0424 Oslo, Norway
3. Department of Immunology, Oslo University Hospital, Postbox 4950, 0424 Oslo, Norway
4. Institute of Clinical Medicine, University of Oslo, Postbox 1171, Blindern 0318 Oslo, Norway
5. Division of Emergencies and Critical Care, Department of Research and Development, Oslo University Hospital, Postbox 4950, N-0424 Oslo, Norway
6. Department of Haematology, Oslo University Hospital, Postbox 4950, N-0424 Oslo, Norway
7. Department of Haematology, Akershus University Hospital, Postbox 1000, 1478 Lørenskog, Norway
8. Department of Microbiology, Oslo University Hospital, Postbox 4950, N-0424 Oslo, Norway
9. Department of Cardiology, Oslo University Hospital, Postbox 4950, N-0424 Oslo, Norway
10. Faculty of Health Sciences, K.G. Jebsen TREC, University of Tromsø, Postbox 6050, Langnes 9037 Tromsø, Norway
11. Division of Infection Control and Environmental Health, Norwegian Institute of Public Health, Postbox 222, Skøyen, 0213 Oslo, Norway
12. Division of Rheumatology and Research, Diakonhjemmet Hospital, Postbox 23 Vindern, 0319 Oslo, Norway
13. Section of Clinical Immunology and Infectious Diseases, Oslo University Hospital, Postbox 4950, N-0424 Oslo, Norway
14. Department of Neurology, Oslo University Hospital, Postbox 4950, N-0424 Oslo, Norway