[1] Rigshosp, Ctr Rheumatol & Spine Dis, Copenhagen Ctr Arthrit Res COPECARE, Glostrup Nordre Ringvej 57, DK-2600 Glostrup, Denmark
[2] Univ Copenhagen, Dept Clin Med, Copenhagen, Denmark
[3] Hosp Gen Univ Gregorio Maranon, Dept Rheumatol, Madrid, Spain
[4] Univ Complutense, Madrid, Spain
[5] Hosp Univ Fdn Jimenez Diaz, Dept Rheumatol, Joint & Bone Res Unit, Madrid, Spain
[6] Univ Torino, Dipartimento Sci Clin & Biol, Turin, Italy
[7] Inst Poal Reumatol, Serv Reumatol, Barcelona, Spain
[8] Ambroise Pare Hosp, AP HP, Dept Rheumatol, Versailles, France
[9] Hop La Pitie Salpetriere, AP HP, Dept Rheumatol, Paris, France
[10] Rigshosp, Ctr Rheumatol & Spine Dis, COPECARE, Glostrup, Denmark