About the Authors

Erlangga Yusuf

angga.yusuf@gmail.com

Affiliation Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands

Jessica Bijsterbosch

Affiliation Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands

P. Eline Slagboom

Affiliation Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands

Herman M. Kroon

Affiliation Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands

Frits R. Rosendaal

Affiliation Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands

Tom W. J. Huizinga

Affiliation Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands

Margreet Kloppenburg

Affiliations Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands, Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands

Competing Interests

The authors have read the journal's policy and have the following conflicts: This study was financially supported by Pfizer (Groton, CT, United States of America) and TI-Pharma. 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: EY JB MK. Performed the experiments: EY JB HK MK. Analyzed the data: EY JB MK. Contributed reagents/materials/analysis tools: EY JB MK FR TH. Wrote the paper: EY JB MK. Drafted the article: EY JB MK Revised the article for important intellectual content: PS HK FR TH.