1. Section of Rheumatology, Yale School of Medicine, New Haven, CT, USA
2. Division of Rheumatology, The Medical College of Wisconsin, Milwaukee, WI, USA
3. Department of Rheumatology, University College Dublin, Dublin, Ireland
4. Division of Clinical Immunology and Rheumatology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
5. Department of Rheumatology and Clinical Immunology, Medical Department, University Medical Center Schleswig-Holstein, Kiel, Germany
6. Section of Rheumatology, Allergy and Immunology, Department of Medicine, Yale School of Medicine, New Haven, CT, USA
7. Section of Rheumatology, Department of Medicine, VA Connecticut Healthcare System, West Haven, CT, USA
8. Section of Rheumatology, Department of Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA
9. Saint Louis University School of Medicine, Division of Rheumatology St. Louis, MO, USA
10. Division of Rheumatology, Department of Medicine V, University Medical Centre Mannheim, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
11. Section of Rheumatology, Department of Medicine, Boston University School of Medicine, Boston, MA, USA
12. Centre for Rheumatology & Department of Neuromuscular Diseases, University College London, London, UK
13. National Institute for Health Research (NIHR) University College London Hospitals Biomedical Research Centre, University College London Hospitals NHS Foundation Trust, London, UK
14. University of Queensland School of Clinical Medicine, HERSTON, Queensland, Australia
15. Division of Rheumatology, Department of Medicine, University of Washington, WA, USA., Seattle
16. NSW Health, New South Wales, Australia
17. Rheumatology, Division of Medicine, University College London, United Kingdom
18. Clinical Epidemiology Program, Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital and Harvard Medical School
19. Department of Medicine, University of Otago, Wellington, New Zealand
20. Division of Rheumatology, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA