1. Katholieke Universiteit Leuven, Department of Rehabilitation Sciences, Leuven, Belgium, Southampton General Hospital, Mailpoint 886, Tremona Road, Southampton, UK SO16 6YD,
2. Katholieke Universiteit Leuven, Department of Rehabilitation Sciences, Leuven, Belgium
3. Katholieke Universiteit Leuven, Department of Neurology, UZ Gasthuisberg, Leuven, Belgium
4. Heilig Hart Ziekenhuis Leuven, Department of Neurology, Leuven, Belgium