1. Amsterdam Rehabilitation Research Center, Reade, Amsterdam, The Netherlands,
2. University of Groningen, University Medical Center Groningen, Center for Human Movement Sciences, Groningen, The Netherlands,
3. Faculty of Human Movement Sciences, Research Institute MOVE, VU University, Amsterdam, The Netherlands,
4. Department of Research & Development, Heliomare Rehabilitation Center, Wijk aan Zee, The Netherlands, and
5. Center for Rehabilitation, University Medical Center Groningen, Groningen, The Netherlands