1. Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
2. Department of Rheumatology, Maasstad Hospital, Rotterdam, The Netherlands
3. School of Healthcare, University of Leeds, Leeds, United Kingdom
4. Department of Orthopaedics, Rehabilitation and Physical Therapy, Leiden University Medical Center, Leiden
5. Sophia Rehabilitation Center, The Hague, The Netherlands
6. Rijnlands Rehabilitation Center, Leiden, The Netherlands