1. Haemostasis Research Unit, Department of Haematology, University College London, London, UK
2. University College London Hospitals NHS Foundation Trust, London, UK
3. Rheumatology Department, Clinica Universidad de Navarra, Madrid, Spain
4. Barbara Volcker Center for Women and Rheumatic Disease, Hospital for Special Surgery, Weill Cornell Medicine, New York, NY, USA
5. Division of Rheumatology, Department of Internal Medicine, Mayo Clinic, Rochester, Minnesota, USA
6. Robert D. and Patricia E. Kern Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, Minnesota, USA
7. Centre for Rheumatology, Division of Medicine, University College London, London, UK
8. Division of Rheumatology, University of Michigan, Ann Arbor, Michigan, USA
9. Division of Hematology, Department of Medicine, and Department of Pathology, Duke University Medical Center, Durham, NC, USA
10. Division of Rheumatology, Hospital for Special surgery, Weill Cornell Medicine, New York, NY, USA
11. First Department of Propaedeutic Internal Medicine, National and Kapodistrian University of Athens, Athens, Greece
12. UCL EGA Institute for Women’s Health, University College London, London, UK
13. Antiphospholipid Standardization Laboratory, University of Texas Medical Branch, Galveston, TX, USA
14. Department of Medicine, Intermountain Medical Center, Murray UT; Division of General Internal Medicine, University of Utah School of Medicine, Salt Lake City, UT, USA
15. University of São Paulo, São Paulo, Brazil