1. Erasmus MC University Medical Center Rotterdam, Rotterdam, Netherlands
2. University Medical Center Utrecht and De Hoogstraat, Utrecht, Netherlands
3. University of Groningen, University Medical Center Groningen, Groningen, Netherlands
4. Rijndam Rehabilitation, Rotterdam, Netherlands
5. Roessingh Rehabilitation Center, Enschede, Netherlands
6. Sint Maartenskliniek, Nijmegen, Netherlands
7. Rehabilitation Center De Hoogstraat, Utrecht, Netherlands
8. VU University Medical Center, Amsterdam, Netherlands