[1] Linkoping Univ, Dept Physiotherapy, Fac Hlth Sci, SE-58183 Linkoping, Sweden
[2] Malardalen Univ, Sch Hlth Care & Social Welf, Vasteras, Sweden
[3] Ryhov Hosp, Dept Orthoped, Jonkoping, Sweden
[4] Univ Gothenburg, Dept Orthoped, Inst Clin Sci, Sahlgrenska Acad, Gothenburg, Sweden
[5] Spine Ctr, Gothenburg, Sweden
[6] Ryhov Hosp, Neuroorthoped Ctr, Jonkoping, Sweden
[7] Univ Uppsala Hosp, Dept Neurosci, Uppsala, Sweden
[8] Ryhov Hosp, Dept Physiotherapy, Jonkoping, Sweden