1. Department of Paediatric Immunology and Centre for Cellular and Molecular Intervention; University Medical Center Utrecht; The Netherlands
2. Department of Paediatrics; Meander Medisch Centrum Amersfoort; The Netherlands
3. Department of Paediatrics; St. Antonius Ziekenhuis; Nieuwegein; The Netherlands
4. Department of Paediatric Endocrinology; University Medical Center Utrecht; The Netherlands
5. Department of Paediatrics; Zuwe Hofpoort Ziekenhuis; Woerden; The Netherlands
6. Department of Paediatrics; Ziekenhuis St Jansdal; Harderwijk; The Netherlands
7. Department of Paediatrics; Isala klinieken; Zwolle; The Netherlands
8. Department of Paediatrics; Diakonessenhuis; Utrecht; The Netherlands
9. Immunology/Rheumatology, Erasmus MC Sophia; Rotterdam; The Netherlands