About the Authors

Liseth Siemons

L.siemons@utwente.nl

Affiliation Arthritis Center Twente, Department of Psychology, Health & Technology, University of Twente, Enschede, the Netherlands

Peter M. ten Klooster

Affiliation Arthritis Center Twente, Department of Psychology, Health & Technology, University of Twente, Enschede, the Netherlands

Harald E. Vonkeman

Affiliations Arthritis Center Twente, Department of Psychology, Health & Technology, University of Twente, Enschede, the Netherlands, Arthritis Center Twente, Department of Rheumatology, Medisch Spectrum Twente, Enschede, the Netherlands

Mart A. F. J. van de Laar

Affiliations Arthritis Center Twente, Department of Psychology, Health & Technology, University of Twente, Enschede, the Netherlands, Arthritis Center Twente, Department of Rheumatology, Medisch Spectrum Twente, Enschede, the Netherlands

Cees A. W. Glas

Affiliation Department of Research Methodology, Measurement and Data Analysis, University of Twente, Enschede, the Netherlands

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LS PTK HV MVDL CG. Performed the experiments: LS CG. Analyzed the data: LS CG. Contributed reagents/materials/analysis tools: LS PTK HV MVDL CG. Wrote the paper: LS PTK HV MVDL CG.