1. Children's Hospital; University of Helsinki and Helsinki University Hospital; Helsinki Finland
2. Research Programs Unit, Diabetes and Obesity; University of Helsinki; Helsinki Finland
3. Immunogenetics Laboratory, Institute of Biomedicine; University of Turku; Turku Finland
4. Department of Clinical Microbiology; Turku University Hospital; Turku Finland
5. Folkhälsan Research Center; Helsinki Finland
6. Tampere Center for Child Health Research; Tampere University Hospital; Tampere Finland