1. Department of General Pediatrics Paediatric Internal Medicine, Rheumatology and Infectious Diseases National Reference Centre for Rare Paediatric Inflammatory Rheumatisms and Systemic Auto‐immune diseases RAISE Robert Debré University Hospital Assistance Publique‐Hôpitaux de Paris Paris France
2. INSERM UMR1149 Université Paris Diderot‐Sorbonne Paris‐Cité Paris France
3. Department of Rheumatology Cochin University Hospital Assistance Publique‐Hôpitaux de Paris ParisFrance
4. Department of Paediatric Nephrology and Internal Medicine Purpan University Hospital Toulouse France
5. Department of Dermatology Saint Louis University Hospital Assistance Publique‐Hôpitaux de Paris Paris France
6. Department of Paediatric Rheumatology National Reference Centre for Auto‐inflammatory Diseases CEREMAIA Kremlin Bicêtre University Hospital Assistance Publique‐Hôpitaux de Paris Kremlin Bicêtre France
7. Department of Paediatric Emergencies Purpan University Hospital Toulouse France
8. Department of Internal Medicine and Clinical Immunology Referral Centre for Rare Systemic and Auto‐immunes Diseases C. Huriez University Hospital Lille France
9. Department of Rheumatology Bichat‐Claude Bernard University Hospital Assistance Publique‐Hôpitaux de Paris Paris France
10. Department of Rheumatology Purpan University Hospital Toulouse France
11. Department of Dermatology Larrey Hospital Paul Sabatier University Toulouse France
12. Department of Pediatric Hematology and Oncology Assistance Publique‐Hôpitaux de Paris GH HUEP Armand Trousseau Hospital Paris France
13. UMRS_938 CDR Saint‐Antoine Sorbonne Université Paris France
14. Department of Medical Genetics Rare diseases and Personalized medicine Rare and Autoinflammatory diseases unit Montpellier University Hospital University of Montpellier Montpellier France
15. Department of Paediatric Rheumatology Leuven University Hospital Leuven Belgium
16. Department of Anatomopathology Saint Louis University Hospital Assistance Publique‐Hôpitaux de Paris Paris France
17. Biology and Genetics of Bacterial Cell Wall Unit Pasteur Institute Paris France