1 National Institute for Health Research Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust.
2 Centre for Musculoskeletal Research, University of Manchester, Manchester Academic Health Science Centre.
3 Centre for Epidemiology Versus Arthritis, University of Manchester, Manchester.
4 Department of Rheumatology, Salford Royal NHS Foundation Trust, Salford.
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.
7 Division of Immunology and Rheumatology, Department of Medicine and Dermatology, Stanford University, Stanford.
8 Palo Alto Health Care System, Palo Alto.
9 Department of Dermatology, School of Medicine, Stanford University, Stanford, CA.
10 Division of Rheumatology.
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.
15 National Institute for Health Research University College London Hospitals Biomedical Research Centre, University College London Hospitals NHS Trust.
16 Department of Rheumatology, Northwick Park Hospital, London North West University Healthcare NHS Trust, London.
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.
22 Department of Dermatology, Brigham and Women's Hospital, Boston, MA.
23 Department of Dermatology, University of Pennsylvania.
24 Division of Dermatology, Corporal Michael J. Crescenz VA Medical Center, Philadelphia.
25 Division of Rheumatology and Clinical Immunology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA.