[1] Hasselt Univ, Fac Rehabil Sci, REVAL Rehabil Res Ctr, B-3500 Hasselt, Belgium
[2] UMSC, Hasselt, Belgium
[3] UMSC, B-3900 Pelt, Belgium
[4] Izmir Katip Celebi Univ, Fac Hlth Sci, Dept Physiotherapy & Rehabil, Izmir, Turkiye
[5] Aarhus Univ, Dept Publ Hlth, Exercise Biol, Aarhus, Denmark
[6] Izmir Univ, Econ Med Point Hosp, Izmir, Turkiye
[7] Noorderhart Rehabil & MS Ctr, Pelt, Belgium
[8] Chaussee Tervuren 54, B-1410 Waterloo, Belgium
[9] West Tallinn Cent Hosp, Neurol Clin, Tallinn, Estonia
[10] Masku Neurol Rehabil Ctr, Masku 21250, Finland
[11] Charles Univ Prague, Fac Med 3, Dept Rehabil, Prague, Czech Republic
[12] Vall dHebron Univ Hosp, Multiple Sclerosis Ctr Catalonia, Neurorehabil Unit, Barcelona, Spain
[13] Vall dHebron Univ Hosp, Multiple Sclerosis Ctr Catalonia, Neurorehabil Unit, Barcelona 08035, Spain
[14] Univ Int Catalunya, Fac Med & Hlth Sci, Basic Dept, Barcelona, Spain
[15] R Guzzardi Hosp ASP Ragusa, Dept Neurol, Via Papa Giovanni XXIII, I-97019 Vittoria, Ragusa, Italy