1. VTT Technical Research Centre of Finland, Espoo FI-02044, Finland
2. Department of Pediatrics
3. Department of Pediatrics, University of Oulu, Oulu FI-90014, Finland
4. Department of Pediatrics, Tampere University Hospital, Tampere FI-33521, Finland
5. Turku Centre for Biotechnology, Turku FI-20521, Finland
6. Department of Virology, University of Tampere, Tampere FI-33520, Finland
7. Centre for Laboratory Medicine, University Hospital of Tampere, Tampere FI-33520, Finland
8. Immunogenetics Laboratory, University of Turku, Turku FI-20520, Finl
9. Department of Clinical Microbiology, University of Kuopio, FI-70211 Kuopio, Finland
10. Hospital for Children and Adolescents, University of Helsinki, Helsinki FI-00014, Finland