Sylvia Lawry Centre for MS Research, Hohenlindenerstr. 1, D-81677 Munich, Germany. boulesteix@slcmsr.org|Sylvia Lawry Centre for MS Research, Hohenlindenerstr. 1, D-81677 Munich, Germany. boulesteix@slcmsr.org|Sylvia Lawry Centre for MS Research, Hohenlindenerstr. 1, D-81677 Munich, Germany. boulesteix@slcmsr.org