1. Department of Medical Microbiology, University of Oulu, Oulu, Finland
2. Research and Development, Immunobiology, Kabi Biopharma, Stockholm, Sweden
3. Department of Bacteriology and Immunology, University of Helsinki, Helsinki, Finland
4. Department of Pathology, University of Oulu, Oulu, Finland
5. Internal Medicine, University of Oulu, Oulu, Finland