Yvonne Veenhuizen (Radboud University Medical Centre, Donders Centre for Neuroscience, Department of Rehabilitation, Nijmegen), Edith Cup (Radboud University Medical Centre, Donders Centre for Neuroscience, Department of Rehabilitation, Nijmegen), Jan Groothuis (Radboud University Medical Centre, Donders Centre for Neuroscience, Department of Rehabilitation, Nijmegen), Jan Hendriks (Department of Health Evidence, Radboud Institute for Health Sciences, Radboud University Medical Centre, Nijmegen), Baziel Van Engelen (Radboud University Medical Centre, Donders Centre for Neuroscience, Department of Neurology, Nijmegen), Bianca Van Keulen (Rehabilitation Centre Groot Klimmendaal, Arnhem), Sander Geurts (Radboud University Medical Centre, Donders Centre for Neuroscience, Department of Rehabilitation, Nijmegen)