About the Authors
- Fiona Maas
-
* E-mail: f.maas@umcg.nl
Affiliation Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Anneke Spoorenberg
-
Affiliations Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands, Department of Rheumatology, Medical Center Leeuwarden, Leeuwarden, The Netherlands
- Elisabeth Brouwer
-
Affiliation Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Reinhard Bos
-
Affiliation Department of Rheumatology, Medical Center Leeuwarden, Leeuwarden, The Netherlands
- Monique Efde
-
Affiliation Department of Rheumatology, Medical Center Leeuwarden, Leeuwarden, The Netherlands
- Rizwana N. Chaudhry
-
Affiliation Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Nic J. G. M. Veeger
-
Affiliation Department of Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Peter M. A. van Ooijen
-
Affiliation Department of Radiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Rinze Wolf
-
Affiliation Department of Radiology, Medical Center Leeuwarden, Leeuwarden, The Netherlands
- Hendrika Bootsma
-
Affiliation Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Eveline van der Veer
-
Affiliation Department of Laboratory Medicine, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Suzanne Arends
-
Affiliations Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands, Department of Rheumatology, Medical Center Leeuwarden, Leeuwarden, The Netherlands
Competing Interests
Anneke Spoorenberg has received research grants from Abbott, Pfizer, and Wyeth and consulting fees from Abbvie, Pfizer, and UCB. Elisabeth Brouwer and Suzanne Arends have received research grants from Abbott, Pfizer, and Wyeth. Reinhard Bos has received research grants and consulting fees from Pfizer. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials. The other authors have declared that they have no competing interests.
Author Contributions
Conceived and designed the experiments: AS EB HB EV SA. Performed the experiments: FM AS EB RB ME RC PO RW. Analyzed the data: FM. Contributed reagents/materials/analysis tools: FM AS NV EV SA. Wrote the paper: FM AS SA. Critically revised the manuscript: AS EB RB ME RC NV PO RW HB EV SA.