1. Zentrum für Pädiatrische Rheumatologie am Klinikum Stuttgart (ZEPRAS) Stuttgart Germany
2. Pediatric Nephrology, Rheumatology, Dermatology Unit National Referee Centre for Rheumatic and Autoimmune and Systemic Diseases in Children (RAISE) Hospices Civils de Lyon Lyon France
3. Department of Women's and Children's Health Institute of Life Course and Medical Sciences University of Liverpool and Department of Rheumatology Alder Hey Children's NHS Foundation Trust Liverpool UK
4. Department of Paediatric Pneumology, Allergology and Neonatology Children's Hospital, Medical School Hanover Germany
5. German Rheumatism Research Centre Berlin Leibniz Institute and Department of Paediatric Pulmonology, Immunology, and Intensive Care Medicine Charité–Universitätsmedizin Berlin Germany
6. Division of Pediatric Rheumatology Department of Pediatric Oncology, Hematology and Clinical Immunology University Hospital, Medical Faculty Heinrich Heine University Düsseldorf Germany
7. Department of Pediatrics RWTH Aachen Aachen Germany
8. Department of Pediatrics Prof. Hess‐Kinderklinik Bremen Germany
9. Division of Dermatology and Rheumatology Department of Pediatrics and Professor of PediatricsUniversity of Ottawa Ottawa Canada
10. Deutsches Rheuma‐Forschungszentrum Berlin Germany
11. Pediatric Rheumatology University Münster Münster Germany
12. Department of Rheumatology University Düsseldorf Düsseldorf Germany