1. National Institute for Health Research Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester, UK
2. Centre for Musculoskeletal Research, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
3. Centre for Epidemiology Versus Arthritis, University of Manchester, Manchester, UK
4. Department of Rheumatology, Salford Royal NHS Foundation Trust, Salford, UK
5. Royal National Hospital for Rheumatic Diseases, Royal United Hospitals Bath NHS Foundation Trust, Bath, UK
6. Division of Medicine, Department of Medicine, University of Louisville, Louisville, KY, USA
7. Division of Immunology and Rheumatology, Department of Medicine and Dermatology, Stanford University, Stanford, USA
8. Palo Alto Health Care System, Palo Alto, USA
9. Department of Dermatology, School of Medicine, Stanford University, Stanford, CA, USA
10. Division of Rheumatology, Philadelphia, PA, USA
11. Division of Epidemiology, University of Pennsylvania, Philadelphia, PA, USA
12. Department of Rheumatology, King’s College Hospital NHS Foundation Trust, London, UK
13. Department of Dermatology, Wright State University, Dayton, OH, USA
14. Centre for Rheumatology and Department of Neuromuscular Diseases, University College London, London, UK
15. National Institute for Health Research University College London Hospitals Biomedical Research Centre, University College London Hospitals NHS Trust, London, UK
16. Department of Rheumatology, Northwick Park Hospital, London North West University Healthcare NHS Trust, London, UK
17. Department of Pharmacy and Pharmacology, University of Bath, Bath, UK
18. Department of Immunology and Rheumatology, Stanford Health Care, Stanford, CA, USA
19. Systemic Autoimmune Unity, Vall D’Hebron General Hospital, Universitat Autonoma de Barcelona, Barcelona, Spain
20. Department of Neurology, Neuromuscular Centre, Göttingen, Germany
21. Harvard Medical School, Boston, MA, USA
22. Department of Dermatology, Brigham and Women’s Hospital, Boston, MA, USA
23. Department of Dermatology, University of Pennsylvania, Philadelphia, USA
24. Division of Dermatology, Corporal Michael J. Crescenz VA Medical Center, Philadelphia, USA
25. Division of Rheumatology and Clinical Immunology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA