[1] Vrije Univ Amsterdam, Med Ctr, MS Ctr Amsterdam, Dept Neurol, Amsterdam, Netherlands
[2] Radboud Univ Nijmegen, Med Ctr, Dept Psychiat, Nijmegen, Netherlands
[3] Radboud Univ Nijmegen, Donders Inst Brain Cognit & Behav, Nijmegen, Netherlands
[4] Radboud Univ Nijmegen, Med Ctr, Dept Med Psychol, Nijmegen, Netherlands
[5] Klimmendaal Rehabil Ctr, Arnhem, Netherlands