1. Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
2. Department of Rheumatology, Cochin Hospital, Paris, France
3. Clinical Immunology and Rheumatology, Academic Medical Center, Amsterdam
4. Department of Rheumatology, Zuyderland Medical Center, Heerlen, The Netherlands
5. Rheumatology Department, Charité – University Medicine, Berlin, Germany
6. Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
7. Department of Internal Medicine and Rheumatology, Klinikum Bielefeld, Bielefeld, Germany
8. Department of Internal Medicine, Ghent University Hospital, Ghent, Belgium
9. Rheumazentrum Ruhrgebiet, Herne, Germany
10. Swedish Medical Center, University of Washington, Seattle, WA
11. Altoona Center for Clinical Research, Duncansville, PA
12. Division of Rheumatology, University of Utah School of Medicine, Salt Lake City, UT, USA
13. UCB Pharma, Slough, UK
14. UCB Pharma, Monheim, Germany
15. UCB Pharma, Raleigh, NC
16. Division of Arthritis and Rheumatic Diseases, Oregon Health & Science University, Portland, OR, USA