1. University of Calgary; Alberta Canada
2. Queen Elizabeth II Health Sciences Centre and Dalhousie University; Halifax Nova Scotia Canada
3. MRC Biostatistics Unit; University of Cambridge; Cambridge UK
4. Centre for Prognosis Studies in the Rheumatic Diseases; Toronto Western Hospital and University of Toronto; Toronto Ontario Canada
5. Research Institute of the McGill University Health Center; Montreal Quebec Canada
6. Instituto Nacional de Ciencias Medicas y Nutrición; Mexico City Mexico
7. Rheumatology Research Group, Institute of Inflammation and Ageing, College of Medical and Dental Sciences; University of Birmingham; Birmingham UK
8. Hanyang University Hospital for Rheumatic Diseases; Seoul Korea
9. McGill University Health Centre; Montreal Quebec Canada
10. Cedars-Sinai/David Geffen School of Medicine at the University of California; Los Angeles
11. University College London; London UK
12. State University of New York Downstate Medical Center; Brooklyn New York
13. Johns Hopkins University School of Medicine; Baltimore Maryland
14. Arthritis Research UK Epidemiology Unit; Institute of Inflammation and Repair; Manchester Academic Health Sciences Centre; the University of Manchester, and NIHR Manchester Musculoskeletal Biomedical Research Unit; Central Manchester University Hospitals National Health Service Foundation Trust; Manchester Academic Health Science Centre; Manchester UK
15. CHU de Québec-Université Laval; Quebec City Canada
16. Northwestern University and Feinberg School of Medicine; Chicago Illinois
17. Lupus Research Unit, The Rayne Institute; St Thomas's Hospital, King's College London School of Medicine; London UK
18. Feinstein Institute for Medical Research; Manhasset New York
19. University of Alabama at Birmingham
20. University of Pittsburgh School of Medicine; Pittsburgh Pennsylvania
21. Lund University; Lund Sweden
22. Lanarkshire Centre for Rheumatology; Hairmyres Hospital; East Kilbride Scotland UK
23. Karolinska Institute; Stockholm Sweden
24. Josep Font Autoimmune Diseases Laboratory; IDIBAPS; Department of Autoimmune Diseases; Hospital Clinic; Barcelona Spain
25. BioCruces Health Research Institute; Hospital Universitario Cruces; University of the Basque Country; Barakaldo Spain
26. Emory University School of Medicine; Atlanta Georgia
27. University of California Los Angeles School of Medicine; La Jolla
28. Istanbul University; Istanbul Turkey
29. Medical University of South Carolina; Charleston
30. University of Manitoba; Winnipeg Manitoba Canada
31. Copenhagen Lupus and Vasculitis Clinic; Rigshospitalet, Copenhagen University Hospital; Copenhagen Denmark
32. Hospital for Joint Diseases; New York University Seligman Center for Advanced Therapeutics; New York New York