1. Department of Endocrinology, Children's HospitalUniversity of Helsinki and Helsinki University HospitalHelsinki Finland
2. Department of Clinical PhysiologyUniversity of Helsinki and Helsinki University HospitalHelsinki Finland
3. Department of PediatricsLapland Central HospitalRovaniemi Finland
4. Division of Cardiology, Heart and Lung CenterUniversity of Helsinki and Helsinki University HospitalHelsinki Finland