1. Department of Rheumatology, Sint Maartenskliniek, Nijmegen, The Netherlands
2. Department of Rheumatology, Rijnstate, Arnhem, The Netherlands
3. Department of Rheumatology, Radboud University Medical Center, Nijmegen, The Netherlands
4. IQ Healthcare, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands