[1] Reade, Amsterdam Rehabil Res Ctr, Amsterdam, Netherlands
[2] Vrije Univ Amsterdam, Med Ctr, EMGO, Dept Rehabil Med, Amsterdam, Netherlands
[3] Univ Gothenburg, Dept Clin NeuroSci & Rehabil, Inst NeuroSci & Physiol, Gothenburg, Sweden
[4] Reade, Jan van Breemen Res Inst, Amsterdam, Netherlands
[5] Vrije Univ Amsterdam, Med Ctr, Dept Rheumatol, Amsterdam, Netherlands
[6] Glasgow Caledonian Univ, Inst Appl Hlth Res, Sch Hlth & Life Sci, Glasgow G4 0BA, Lanark, Scotland