1. Department of Paediatrics and Adolescent Medicine, University of Turku, Turku, Finland
2. Department of Paediatrics and Adolescent Medicine, Turku University Hospital, Turku, Finland
3. Department of Clinical Microbiology, Turku University Hospital, Turku, Finland
4. Institute of Biomedicine, University of Turku, Turku, Finland
5. Wallac Oy, PerkinElmer, Turku, Finland