1. Amsterdam UMC, Vrije Universiteit Amsterdam; Department of Rehabilitation Medicine; Amsterdam Movement Sciences; Amsterdam the Netherlands
2. Heliomare Research and Development; Wijk aan Zee the Netherlands
3. Department of Neuromedicine and Movement Science; Norwegian University of Science and Technology; Trondheim Norway
4. Clinical Services; St Olavs University Hospital; Trondheim Norway
5. Department of Human Movement Sciences; Faculty of Behaviour and Movement Sciences; Amsterdam Movement Sciences; Vrije Universiteit Amsterdam; Amsterdam the Netherlands