[1] Univ Southern Denmark, Dept Reg Hlth Res, Odense, Denmark
[2] Univ Hosp Southern Denmark, Danish Hosp Rheumat Dis, Sonderborg, Denmark
[3] Univ Hosp Southern Denmark, Sonderborg Sygehus, Aabenraa, Denmark
[4] Copenhagen Univ Hosp, Rigshosp, Copenhagen Ctr Arthrit Res, Ctr Rheumatol & Spine Dis,Patient res partner, Copenhagen, Denmark
[5] Lund Univ, Dept Clin Sci, Lund, Sweden
[6] Copenhagen Univ Hosp, Rigshosp, Copenhagen Ctr Arthrit Res, Ctr Rheumatol & Spine Dis, Glostrup, Denmark
[7] Univ Copenhagen, Dept Clin Med, Copenhagen, Denmark
[8] Danish Hosp Rheumat Dis, Patient res partner, Sonderborg, Denmark