[1] Karolinska Inst, Div Rheumatol, Dept Med Solna, Solna, Sweden
[2] Karolinska Univ Hosp, Solna, Sweden
[3] Orebro Univ, Fac Med & Hlth, Dept Rheumatol, Orebro, Sweden
[4] Catholic Univ Louvain, Pole Pathol Rhumatismales Inflammatoires & Syst, Inst Rech Expt & Clin, Louvain, Belgium
[5] Clin Univ St Luc, Serv Rhumatol, Louvain, Belgium
[6] Linkoping Univ, Dept Biomed & Clin Sci, Div Inflammat & Infect Rheumatol, Linkoping, Sweden
[7] Ohio State Univ, Coll Med, Dept Internal Med, Columbus, OH USA