About the Authors
- Freke Wink
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Contributed equally to this work with: Freke Wink, Suzanne Arends
* E-mail: f.r.wink@umcg.nl
Affiliation Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Suzanne Arends
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Contributed equally to this work with: Freke Wink, Suzanne Arends
Affiliations Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands, Rheumatology, Medical Center Leeuwarden, Leeuwarden, The Netherlands
- Stephen P. McKenna
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Affiliation Galen Research Ltd, Manchester, United Kingdom
- Pieternella M. Houtman
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Affiliation Rheumatology, Medical Center Leeuwarden, Leeuwarden, The Netherlands
- Elisabeth Brouwer
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Affiliation Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Anneke Spoorenberg
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Affiliations Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands, Rheumatology, Medical Center Leeuwarden, Leeuwarden, The Netherlands
Competing Interests
The authors have read the journal’s policy and have the following conflict: co-author professor McKenna is Director of Research and CEO at Galen Research, which is the leading European developer of quality of life instruments for use in clinical trials and health economic studies. This does not alter the authors’ adherence to all the PLOS ONE policies on sharing data and materials.
Author Contributions
Conceived and designed the experiments: SA SM AS. Performed the experiments: FW SA AS. Analyzed the data: FW SA. Wrote the paper: FW SA SM PH EB AS.