1. Amsterdam Rehabilitation Research Center/Reade; Amsterdam The Netherlands
2. Amsterdam Rehabilitation Research Center/Reade, and EMGO Institute for Health and Care Research, VU University Medical Center; Amsterdam The Netherlands
3. VU University Medical Center; Amsterdam The Netherlands
4. Allied Healthcare Center for Rheumatology and Rehabilitation; Groningen The Netherlands
5. VU University Medical Center and Jan van Breemen Research Institute/Reade; Amsterdam The Netherlands
6. Institute of Applied Health Research and School of Health, Glasgow Caledonian University, Glasgow; Scotland UK