1. Department of Virology, Faculty of Medical Sciences and BiotechnologyTampere UniversityTampere Finland
2. Department of DermatologyTampere University HospitalTampere Finland
3. Allergy CentreTampere University HospitalTampere Finland
4. Department of Clinical MicrobiologyFimlab Laboratories LtdTampere Finland
5. Children's HospitalUniversity of Helsinki and Helsinki University HospitalHelsinki Finland
6. Research Programs Unit, Diabetes and ObesityUniversity of HelsinkiHelsinki Finland
7. Department of Laboratory Medicine and Medical Research UnitSeinäjoki Central Hospital and University of TampereSeinäjoki Finland
8. Faculty of Social SciencesTampere UniversityTampere Finland
9. Immunogenetics LaboratoryUniversity of Turku and Turku University HospitalTurku Finland
10. Department of PediatricsJorvi Hospital, Helsinki University HospitalEspoo Finland
11. Department of PediatricsUniversity of TartuTartu Estonia
12. Children's Clinic of Tartu University HospitalTartu Estonia
13. Folkhälsan Research CenterHelsinki Finland
14. Department of PediatricsTampere University HospitalTampere Finland