1 Department of Rheumatology, Rijnstate Hospital, Arnhem, Department of Primary and Community Care, Radboud University Medical Centre, Nijmegen, Department of Clinical Research, Rijnstate Hospital, Arnhem and Department of Rheumatology, Radboud University Medical Centre, Nijmegen, The Netherlands lkienhorst@rijnstate.nl.
2 Department of Rheumatology, Rijnstate Hospital, Arnhem, Department of Primary and Community Care, Radboud University Medical Centre, Nijmegen, Department of Clinical Research, Rijnstate Hospital, Arnhem and Department of Rheumatology, Radboud University Medical Centre, Nijmegen, The Netherlands Department of Rheumatology, Rijnstate Hospital, Arnhem, Department of Primary and Community Care, Radboud University Medical Centre, Nijmegen, Department of Clinical Research, Rijnstate Hospital, Arnhem and Department of Rheumatology, Radboud University Medical Centre, Nijmegen, The Netherlands lkienhorst@rijnstate.nl.
3 Department of Rheumatology, Rijnstate Hospital, Arnhem, Department of Primary and Community Care, Radboud University Medical Centre, Nijmegen, Department of Clinical Research, Rijnstate Hospital, Arnhem and Department of Rheumatology, Radboud University Medical Centre, Nijmegen, The Netherlands.