1. Department of Paediatric Rheumatology, Wilhelmina Children’s Hospital, Utrecht
2. Department of Paediatric Rheumatology, Sophia Children's Hospital, Erasmus Medical Centre, Rotterdam, The Netherlands
3. Department of Paediatric Rheumatology, Alder Hey Children's Hospital, Liverpool
4. Department of Paediatric Rheumatology, University College London Great Ormond Street Institute of Child Health and Great Ormond St Hospital for Children NHS Foundation Trust, London, UK
5. Department of Paediatric Rheumatology, Hacettepe University, Ankara, Turkey
6. Department of Paediatric Rheumatology, University Children's Hospital Ljubljana, Ljubljana, Slovenia
7. Department of Paediatric Rheumatology, Necker Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
8. 1st Faculty of Medicine, Charles University and General University Hospital, Prague, Czech Republic
9. Department of Paediatric Rheumatology, The Hospital for Sick Children, University of Toronto, Toronto, Canada
10. Department of Paediatric Rheumatology, Bicêtre University Hospital, APHP, University of Paris Sud, Paris, France
11. Department of Paediatric Rheumatology, Hospital for Children and Adolescents, University of Helsinki, Helsinki, Finland
12. Department of Paediatric Rheumatology, Gaslini Children's Hospital, Genoa, Italy
13. Meir Medical Center, Kfar Saba, Tel Aviv University, Sackler School of Medicine, Tel Aviv, Israel
14. Institute of Translational Medicine, University of Liverpool, Liverpool, UK