1. Department of Sport Science, University of Aarhus, Aarhus N, Denmark, , Department of Neurology, Aarhus University Hospital, Aarhus C, Denmark, MS-clinic of southern Denmark (Sonderborg, Vejle, Esbjerg), Department of Neurology, Sonderborg Hospital, Sonderborg, Denmark
2. MS-clinic of southern Denmark (Sonderborg, Vejle, Esbjerg), Department of Neurology, Sonderborg Hospital, Sonderborg, Denmark
3. Department of Sport Science, University of Aarhus, Aarhus N, Denmark