[1] Diakonhjemmet Hosp, Dept Rheumatol, Natl Advisory Unit Rehabil Rheumatol, Oslo, Norway
[2] Keele Univ, Arthrit Res UK, Primary Care Ctr, Res Inst Primary Care & Hlth Sci, Keele, Staffs, England
[3] Univ Southern Denmark, Res Unit Musculoskeletal Funct & Physiotherapy, Inst Sports Sci & Clin Biomech, Odense, Denmark
[4] Univ Algarve, Fac Sci & Technol, Faro, Portugal
[5] Univ Algarve, Ctr Res & Dev Hlth CESUAlg, Faro, Portugal
[6] Univ Lisbon, Ctr Stat & Applicat CEAUL, Lisbon, Portugal
[7] Univ Algarve, Sch Hlth ESSUAlg, Faro, Portugal