1. Amsterdam Rehabilitation Research Center, Reade, 1054 HW Amsterdam, The Netherlands
2. Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, 1081 BT Amsterdam, The Netherlands
3. Reade Center for Rehabilitation & Rheumatology, 1054 HW Amsterdam, The Netherlands
4. Centre of Excellence for Rehabilitation Medicine, University Medical Centre Utrecht Brain Centre, University Medical Centre Utrecht, 3583 TM Utrecht, The Netherlands
5. Department of Spinal Cord Injury and Orthopedics, De Hoogstraat Rehabilitation, 3583 TM Utrecht, The Netherlands
6. Department of Rehabilitation Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229-3900, USA
7. School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough LE11 3TU, UK