[1] Leiden Univ, Med Ctr, Leiden, Netherlands
[2] Ctr Hosp & Univ Coimbra, Dept Rheumatol, Coimbra, Portugal
[3] Leiden Univ, Dept Rheumatol, Med Ctr, Leiden, Netherlands
[4] Amsterdam Rheumatol & Clin Immunol Ctr, Amsterdam, Netherlands
[5] Zuyderland MC, Herleen, Netherlands
[6] Univ Amsterdam, Amsterdam UMC, Dept Rheumatol & Clin Immunol, Amsterdam, Netherlands
[7] Amsterdam Infect & Immun Inst, Dept Expt Immunol, Amsterdam, Netherlands
[8] Amsterdam Rheumatol & Immunol Ctr ARC, Acad Med Ctr, Amsterdam, Netherlands
[9] Diakonhjemmet Hosp, Ctr Treatment Rheumat & Musculoskeletal Dis REMED, Oslo, Norway
[10] Groene Hart Ziekenhuis, Gouda, Netherlands
[11] Lund Univ, Akarp, Sweden
[12] Univ Padua, Dept Rheumatol, Padua, Italy