1. Department of Rheumatology, University Hospital Zurich, University of Zurich, Switzerland
2. Rheumatology Unit, Geneva University Hospitals, Geneva, Switzerland
3. Department of Rheumatology, Kantonsspital Aarau, Switzerland
4. Department of Clinical Immunology and Allergy, Lausanne, Switzerland
5. Department of Rheumatology and Clinical Immunology/Allergology, Inselspital, University of Bern, Switzerland
6. Department of Pathophysiology Medical School, National University of Athens, Greece
7. Rheumatology Unit, University Hospital of Cagliari, Monserrato (CA), Italy
8. Laboratory of microcirculation and inflammation, VA Nasonova Institute of Rheumatology, Moscow, Russian Federation
9. Rheumatology Section, Department of Medicine, University of Verona, Italy
10. Department of Translational and Precision Medicine, Sapienza University of Rome, Italy
11. Asklepios Clinic Altona, Medical Department, Rheumatology, Immunology, Nephrology, Hamburg, Germany
12. Rheumatology Department. University Hospital 12th of October, Madrid, Spain
13. Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Padova, Italy
14. University Hospital Tuebingen, Centre for Interdisciplinary Clinical Immunology, Rheumatology and Auto-inflammatory Diseases and Department of Internal Medicine II (Haematology, Oncology, Immunology and Rheumatology), Germany
15. Department of Rhumatology and Clinical Immunology, Justus-Liebig-University Giessen, Kerckhoff-Clinic Bad Nauheim, Germany
16. Department of Rheumatology, University of Ghent, Belgium
17. Department of Internal Medicine 3, University Clinic Erlangen, Germany
18. Marche Polytechnic University, Institute of Clinical Medicine, University of Ancona, Italy
19. Department of Rheumatology, Rikshospitalet University Hospital, Oslo, Norway
20. Department of Rheumatology, University Hospital Basel, Switzerland