[1] Univ Gothenburg, Inst Neurosci & Physiol, Sahlgrenska Acad, Unit Physiotherapy,Dept Hlth & Rehabil, Gothenburg, Sweden
[2] Sahlgrenska Sports Med Ctr, Gothenburg, Sweden
[3] Fdn Policlin Univ Campus Biomed, Via Alvaro Portillo 200, I-00128 Rome, Italy
[4] Univ Campus Biomed Roma, Dept Med & Surg, Res Unit Orthopaed & Trauma Surg, Rome, Italy
[5] Univ Gothenburg, Inst Clin Sci, Sahlgrenska Acad, Dept Orthopaed, Gothenburg, Sweden
[6] Sahlgrens Univ Hosp, Dept Orthopaed, Molndal, Sweden
[7] Swedish Olymp Comm, Stockholm, Sweden