1. University of Applied Sciences Leiden; Department of Physiotherapy; Zernikedreef 11 PO Box 382 Leiden Netherlands 2300 AJ
2. VU University Medical Center; Department of Rehabilitation Medicine, MOVE Research Institute Amsterdam; De Boelelaan 1118 Amsterdam Netherlands 1007 MB
3. Faculty of Health, University of Applied Sciences Leiden; P.O.Box 382 Leiden Netherlands 2300 AJ
4. Neuroscience Campus Amsterdam, VU University Medical Center; Department of Neurology; Amsterdam Netherlands