1. Rijnlands Rehabilitation Centre, Leiden, The Netherlands;
2. Sophia Rehabilitation, The Hague, The Netherlands;
3. Department of Orthopaedics, Rehabilitation, and Physical Therapy, Leiden University Medical Centre, Leiden, The Netherlands;
4. Department of Rehabilitation Medicine, Haaglanden Medical Centre, The Hague, The Netherlands;
5. Department of Rehabilitation Medicine, Reinier de Graaf Gasthuis, Delft, The Netherlands