[1] Hasselt Univ, Fac Rehabil Sci, REVAL Rehabil Res Ctr, B-3500 Hasselt, Belgium
[2] Tel Aviv Univ, Sackler Fac Med, Sch Hlth Profess, Dept Phys Therapy, IL-6997801 Tel Aviv, Israel
[3] Italian MS Fdn FISM, Sci Res Area, I-16149 Genoa, Italy
[4] Natl MS Ctr Melsbroek, B-1820 Steenokkerzeel, Belgium
[5] Rehabil & MS Ctr Overpelt, B-3900 Pelt, Belgium
[6] De Mick AZ Klina, B-2930 Brasschaat, Belgium
[7] Italian Multiple Sclerosis Soc, AISM Rehabil Serv Genoa, I-16149 Genoa, Italy
[8] Sheba Med Ctr, Multiple Sclerosis Ctr, Derech Sheba 2, IL-5262100 Tel Hashomer, Israel