[1] Univ Alcala, Dept Phys Therapy, Madrid, Spain
[2] Univ Valencia, Fac Physiotherapy, Dept Phys Therapy, E-46003 Valencia, Spain
[3] Vrije Univ Brussel, Fac Phys Educ & Physiotherapy, Dept Human Physiol, Brussels, Belgium
[4] Vrije Univ Brussel, Fac Phys Educ & Physiotherapy, Dept Physiotherapy, Brussels, Belgium
[5] Univ Hosp Brussels, Dept Phys Med & Physiotherapy, Brussels, Belgium
[6] Univ Complutense Madrid, Pain Mot Res Grp, Www Paininmotion Be, Madrid, Spain
[7] Univ Complutense Madrid, Dept Med, Madrid, Spain
[8] Univ Hosp Gottingen, Pain Clin, Ctr Anesthesiol Emergency & Intens Care Med, Robert Koch Str 40, DE-37075 Gottingen, Germany
[9] Univ Gottingen, Inst Neurorehabil Syst, Bernstein Ctr Computat Neurosci, Univ Med Ctr Gottingen, D-37073 Gottingen, Germany