1. Università degli Studi di Genova and IRCCS Istituto Giannina Gaslini Genoa Italy
2. IRCCS Istituto Giannina Gaslini Genoa Italy
3. Università degli Studi di Genova Genoa Italy
4. Western Ukrainian Specialized Children’s Medical Centre Lviv Ukraine
5. The Royal Hospital for Children Glasgow UK
6. Ain Shams University Italian Hospital St. Abbassia Cairo Egypt
7. Clinical Hospital Center Sestre Milosrdnice Zagreb Croatia
8. Tripoli Children’s Hospital Tripoli Libya
9. M. Iashvili Children’s Central Clinic Tbilisi Georgia
10. Hospital General de Mexico Mexico City Mexico
11. ZNA Jan Palfijn Antwerpen, Antwerp, and Gent University Hospital Gent Belgium
12. Red Cross War Memorial Children’s Hospital and Groote Schuur Hospital University of Cape Town Cape Town South Africa
13. Centre Hospitalier Universitaire Vaudois University of Lausanne, Lausanne, and University Hospital of Geneva Geneva Switzerland
14. Hospital De Clinicas Universidad Nacional De Asuncion San Lorenzo Paraguay
15. Ryhov County Hospital Jonkoping Sweden
16. Royal Hospital Muscat Oman
17. Hospital of Douera Alger Algeria
18. Hospital Dr. Exequiel Gonzalez Cortes Santiago Chile
19. Instituto Português de Reumatologia Lisbon Portugal
20. Università degli Studi di Genova IRCCS Istituto Giannina Gaslini, Genoa, Italy, and Sechenov First Moscow State Medical University Moscow Russian Federation