1. The Hospital for Sick Children and University of Toronto Toronto Ontario Canada
2. Ramathibodi Hospital Bangkok Thailand
3. Children's of Alabama Birmingham
4. Hospital Sant Joan de Deu Barcelona Spain
5. Olgahospital Klinikum Stuttgart Stuttgart Germany
6. University Children's Hospital Zürich Zürich Switzerland
7. University Hospital Tübingen Tübingen Germany
8. Children's Hospital of Eastern Ontario Ottawa Ontario Canada
9. Emma Children's Hospital, Academic Medical Centre and Amsterdam Rheumatology and Immunology Center Reade, Amsterdam The Netherlands
10. The Hospital for Sick Children Toronto Ontario Canada
11. Alberta Children's Hospital and University of Calgary Calgary Alberta Canada
12. Pediatric Rheumatology Research Institute Bad Bramstedt Germany
13. Emory University School of Medicine and Children's Healthcare of Atlanta Atlanta Georgia
14. University of Campinas Campinas Brazil
15. University of Oslo Oslo Norway
16. Austin Radiological Association Austin Texas
17. University of Alberta Edmonton Alberta Canada
18. Oslo University Hospital Oslo Norway
19. Cincinnati Children's Hospital Medical Center Cincinnati Ohio
20. Christian Medical College and Hospital Vellore Tamil Nadu India
21. Boston Children's Hospital Boston Massachusetts
22. Great Ormond Street Hospital London UK