1. Allergy Centre; Tampere University Hospital; Tampere Finland
2. Centre for Child Health Research; Tampere University and University Hospital; Tampere Finland
3. Institute of Environmental Medicine; Karolinska Institutet; Stockholm Sweden
4. Centre for Allergy Research; Karolinska Institutet; Stockholm Sweden
5. Sachs' Children and Youth Hospital; Stockholm Sweden
6. Department of Orthopaedics; Tampere University Hospital; Tampere Finland
7. Department of Clinical Science; Intervention and Technology (CLINTEC); Division of Orthopedics and Biotechnology; Karolinska Institutet; Stockholm Sweden