1. Pediatric Research Center, Children’s Hospital Helsinki University Hospital University of Helsinki Helsinki Finland
2. Research Programs Unit, Diabetes and Obesity University of Helsinki Helsinki Finland
3. Department of Pediatrics, Tartu University Hospital University of Tartu Tartu Estonia
4. Immunogenetics Laboratory, Institute of Biomedicine University of Turku Turku Finland
5. Clinical Microbiology Turku University Hospital Turku Finland
6. Department of Virology, School of Medicine University of Tampere Tampere Finland
7. Fimlab Laboratories Pirkanmaa Hospital District Tampere Finland
8. Folkhälsan Research Center Helsinki Finland
9. Tampere Center for Child Health Research Tampere University Hospital Tampere Finland