1. Strasbourg University Hospital and University of Strasbourg, CNRS, Institut de Biologie Moléculaire et Cellulaire, Immunopathologie, et Chimie Thérapeutique; Strasbourg France
2. University of Geneva and University Hospital of Geneva; Geneva Switzerland
3. Hospital Clinic of Barcelona and IDIBAPS; Barcelona Spain
4. University of Bari and University Hospital; Bari Italy
5. Diakonhjemmet Hospital; Oslo Norway
6. University of Lisbon and Santa Maria Hospital; Lisbon Portugal
7. Institute of Rheumatology and University Hospital; Prague Czech Republic
8. DANBIO Registry and University of Copenhagen, Copenhagen, Denmark, and Rigshospitalet; Glostrup Denmark
9. Lund University and Skåne University Hospital; Malmö Sweden
10. Université Paris-Sud, Hôpitaux Universitaires Paris-Sud, Hôpital Bicêtre, AP-HP, and INSERM U1184; Le Kremlin Bicêtre France