1. German Rheumatism Research Center and Charité–University Medicine Berlin Berlin Germany
2. Asklepios Clinic Sankt Augustin GmbH, Sankt Augustinand University Hospital of Cologne Cologne Germany
3. German Rheumatism Research Center Berlin Germany
4. Immanuel Krankenhaus Berlin Germany
5. University Medical Center Carl Gustav Carus at the Technische Universität Dresden Dresden Germany
6. Rheumatologie im Struensee‐Haus Hamburg Germany
7. Centre for Pediatric and Adolescent Rheumatology Hamburg Germany
8. German Centre for Pediatric and Adolescent Rheumatology Garmisch‐Partenkirchen Germany
9. Asklepios Clinic Sankt Augustin GmbH Sankt Augustin Germany
10. Kath. Marienkrankenhaus Hamburg Germany
11. Rheinisch‐Westfälische Technische Hochschule Aachen University Aachen Germany