1. Department of Obstetrics Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil
2. Department of Clinical and Biological Sciences Centre of Research of Immunopathology and Rare Diseases University of Turin Turin Italy
3. Departament of Rheumatology Universidade de São Paulo São Paulo Brazil
4. Division of Rheumatology Department of Medicine Hospital for Special Surgery New York NY USA
5. Rheumatology Unit First Department of Propaedeutic Internal Medicine University of Athens Athens Greece
6. Department of Cardiac, Thoracic, and Vascular Sciences University of Padova Padova Italy
7. Rheumatology and Immunology Department Peking University, First Hospital Beijing China
8. Department of Rheumatology University of Milan Milan Italy
9. Autoimmune Diseases Research Unit Department of Internal Medicine Hospital Universitario Cruces Barakaldo Spain
10. Department of Haematology University College London London UK
11. Department of Obstetrics and Gynecology University of Utah Health Sciences and Intermountain Healthcare Salt Lake City UT USA
12. Rheumatology and Clinical Immunology Department of Clinical and Experimental Sciences University of Brescia Brescia Italy
13. Division of Rheumatology NYU School of Medicine New York NY USA
14. Division of Rheumatology Centre Hospitalier de l'Université Laval Québec QC Canada
15. Division of Rheumatology John Hopkins University Baltimore MD USA
16. Rheumatology Department Hospital 12 de Octubre Madrid Spain
17. Department of Autoimmune Diseases Hospital Clínic Barcelona Spain
18. Division of Rheumatology University of Michigan Ann Arbor MI USA
19. Department of Rheumatology, Endocrinology, and Nephrology Faculty of Medicine and Graduate School of Medicine Hokkaido University Sapporo Japan
20. Antiphospholipid Standardization Laboratory Internal Medicine University of Texas Medical Branch Galveston TX USA
21. Department of Rheumatology Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil
22. GlaxoSmithKline Immunology and Inflammation Upper Providence PA USA