[1] Karolinska Inst, Dept Med Solna, Div Rheumatol, Stockholm, Sweden
[2] Karolinska Univ Hosp, Dept Gastroenterol Dermatol & Rheumatol, Stockholm, Sweden
[3] Orebro Univ, Fac Med & Hlth, Dept Rheumatol, Orebro, Sweden
[4] Univ Hosp Geneva, Univ Geneva, Dept Med, Div Rheumatol, Geneva, Switzerland
[5] Univ Geneva, Fac Med, Geneva, Switzerland
[6] Med Univ Vienna, Ctr Med Stat Informat & Intelligent Syst, Sect Outcomes Res, Vienna, Austria
[7] Ludwig Boltzmann Inst Arthrit & Rehabil, Vienna, Austria
[8] Society, Dept Neurobiol Care Sci & Soc, Div Physiotherapy, Dept Neurobiol Care Sci, Stockholm, Sweden
[9] Karolinska Univ Hosp, Dept Occupat Therapy & Physiotherapy, Stockholm, Sweden
[10] Karolinska Univ Hosp Solna, Div Rheumatol, SE-17176 Stockholm, Sweden