1. University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK, and University of Oxford; Oxford UK
2. AP-HP Cochin Hospital, Universite Paris Descartes Sorbonne Paris Cite, and INSERM U1153; Paris France
3. Universite Paris 7, UFR medicale, Assistance Publique-Hôpitaux de Paris, and Hopital Lariboisière, INSERM U1132; Paris France
4. University of Liege; Liege Belgium
5. College of Science, King Saud University; Riyadh Saudi Arabia
6. David Geffen School of Medicine, University of California; Los Angeles
7. University of Florence; Florence Italy
8. TRB Chemedica International SA; Geneva Switzerland
9. Bone and Joint Research Laboratory, University Hospital Fundación Jiménez Díaz; Madrid Spain
10. San Pietro Fatebenefratelli Hospital; Rome Italy
11. Institute of Rheumatology, Charles University; Prague Czech Republic
12. Centre Hospitalier du Valais Romand, Centre Valaisan de Pneumologie; Crans-Montana Switzerland