1. Department of Research and Development, Heliomare Rehabilitation Center, Wijk aan Zee, the Netherlands
2. De Hoogstraat Rehabilitation, Utrecht, the Netherlands
3. Heliomare Rehabilitation Center, Wijk aan Zee, the Netherlands
4. Center of Excellence for Rehabilitation Medicine, Brain Center Rudolf Magnus University Utrecht and De Hoogstraat Rehabilitation, Utrecht, the Netherlands
5. University of Groningen, University Medical Center Groningen, Department of Rehabilitation Medicine, Groningen, the Netherlands