1. Department of Rehabilitation, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands
2. Department of Rehabilitation, Sint Maartenskliniek, Nijmegen, the Netherlands
3. Department of Research, Sint Maartenskliniek, Nijmegen, the Netherlands
4. Department of Orthopaedics, Sint Maartenskliniek, Nijmegen, the Netherlands
5. Rijndam Rehabilitation Center, Rotterdam, the Netherlands
6. Roessingh Research and Development, Enschede, the Netherlands
7. Biomedical Signals and Systems, MIRA–Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, the Netherlands