1. Department of Pediatrics, University of Turku, Turku, Finland and Turku University Hospital, Turku, Finland
2. Immunogenetics Laboratory, University of Turku, Turku, Finland
3. Department of Clinical Microbiology, University of Eastern Finland, Kuopio, Finland
4. Department of Pediatrics, University of Oulu, Oulu, Finland and Oulu University Hospital, Oulu, Finland
5. Department of Virology, University of Tampere, Tampere, Finland
6. Fimlab Laboratories, Pirkanmaa Hospital District, Tampere, Finland
7. Children’s Hospital, University of Helsinki and Helsinki University Central Hospital Helsinki, Finland
8. Diabetes and Obesity Research Program, University of Helsinki, Helsinki, Finland
9. Folkhälsan Research Center, Helsinki, Finland
10. Department of Pediatrics, Tampere University Hospital, Tampere, Finland
11. Department of Physiology, University of Turku, Turku, Finland