1. Cincinnati Children's Hospital Medical Center Cincinnati Ohio
2. Alder Hey Children's National Health Service Foundation Trust and University of Liverpool Liverpool UK
3. The Hospital for Sick Children, University of Toronto Toronto Ontario Canada
4. Hospital Dr. Exequiel Gonzalez Cortes Santiago Chile
5. Children's Institute, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo Sao Paulo Brazil
6. Institute of Rheumatology Belgrade Serbia
7. Hospital Universitario Pedro Ernesto, Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil
8. Meir Medical Centre, Kfar Saba, and Sackler School of Medicine, Tel Aviv University Tel Aviv Israel
9. University of Campinas Faculty of Medical Science Campinas Brazil
10. Nationwide Children's Hospital, Ohio State University Wexner College of Medicine Columbus
11. Ljubljana University Medical Center, University of Ljubljana Medical Faculty Ljubljana Slovenia
12. The Children's Hospital at Montefiore, Albert Einstein College of Medicine New York New York
13. Jaslok Hospital and Research Center Mumbai India
14. Lurie Children's Hospital, Northwestern Feinberg School of Medicine Chicago Illinois
15. Istituto Giannina Gaslini and Università degli Studi di Genova Genoa Italy
16. Baylor College of Medicine and Texas Children's Hospital Houston
17. University of Cincinnati College of Medicine Cincinnati Ohio
18. Istituto Giannina Gaslini and PRINTO Genoa Italy