1. Department of Paediatrics and Adolescent Medicine Rigshospitalet, Copenhagen University Hospital Copenhagen Denmark
2. Institute for Inflammation Research, Center for Rheumatology and Spine Disease Rigshospitalet, Copenhagen University Hospital Copenhagen Denmark
3. Hans Christian Andersen Children's Hospital Odense University Hospital Odense Denmark
4. Department of Clinical Research University of Southern Denmark Odense Denmark
5. Department of Paediatrics Aarhus University Hospital Aarhus Denmark
6. Department of Clinical Medicine Aarhus University Aarhus Denmark
7. Department of Clinical Microbiology Rigshospitalet, Copenhagen University Hospital Copenhagen Denmark
8. Institute of Clinical Medicine University of Copenhagen Copenhagen Denmark