About the Authors

Martijn A. H. Oude Voshaar

A.H.Oudevoshaar@utwente.nl

Affiliation Arthritis Center Twente and Psychology, Health & Technology, University of Twente, Enschede, The Netherlands

Peter M. ten Klooster

Affiliation Arthritis Center Twente and Psychology, Health & Technology, University of Twente, Enschede, The Netherlands

Cees A. W. Glas

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

Harald E. Vonkeman

Affiliations Arthritis Center Twente and Psychology, Health & Technology, University of Twente, Enschede, The Netherlands, Department of Rheumatology and Clinical Immunology, Medisch Spectrum Twente, Enschede, The Netherlands

Erik Taal

Affiliation Arthritis Center Twente and Psychology, Health & Technology, University of Twente, Enschede, The Netherlands

Eswar Krishnan

Affiliation Arthritis, Rheumatism, and Aging Medical Information System Program, Stanford University School of Medicine, Palo Alto, California, United States of America

Hein J. Bernelot. Moens

Affiliation Department of Rheumatology and Clinical Immunology, Ziekenhuisgroep Twente, Almelo, The Netherlands

Maarten Boers

Affiliation Department of Epidemiology and Biostatistics, Vrije Universiteit Medical Center, Amsterdam, The Netherlands

Caroline B. Terwee

Affiliation Department of Epidemiology and Biostatistics, Vrije Universiteit Medical Center, Amsterdam, The Netherlands

Piet L. C. M. van Riel

Affiliation Department of Rheumatic Diseases, Radboud University Medical Centre, Nijmegen, The Netherlands

Mart A. F. J. van de Laar

Affiliations Arthritis Center Twente and Psychology, Health & Technology, University of Twente, Enschede, The Netherlands, Department of Rheumatology and Clinical Immunology, Medisch Spectrum Twente, Enschede, The Netherlands

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MOV CG PTK MVDL EK. Performed the experiments: MOV CG. Analyzed the data: MOV CG PTK CBT. Contributed reagents/materials/analysis tools: HV ET EK HM MVDL PVR CBT MB. Wrote the paper: MOV PTK CG HV ET EK HM MB CBT PVR MVDL.