[1] Danderyd Hosp, Orthopaed Clin, Div Physiotherapy, Stockholm, Sweden
[2] Karolinska Inst, Div Physiotherapy, Dept Neurobiol Care Sci & Soc, Huddinge, Sweden
[3] Univ Limerick, Dept Clin Therapies, Limerick, Ireland
[4] UZ Leuven, Div Rheumatol, Leuven, Belgium
[5] Katholieke Univ Leuven, Dept Dev & Regenerat, Skeletal Biol & Engn Res Ctr, Leuven, Belgium
[6] Univ Copenhagen, Fac Hlth & Med Sci, Dept Clin Med, Copenhagen, Denmark
[7] Univ Copenhagen, Rigshosp, Copenhagen Ctr Arthrit Res, Ctr Rheumatol & Spine Dis VRR, Copenhagen, Denmark