1. Lupus Research Unit, The Rayne Institute, King’s College London School of Medicine, London, UK
2. Department of Internal Medicine II, Hokkaido University School of Medicine, Sapporo, Japan
3. INOVA Diagnostics Inc., San Diego, California, USA
4. Sanquin Research, Sanquin Blood Supply Foundation, Amsterdam, The Netherlands; Department of Clinical Chemistry and Hematology, University Medical Center Utrecht, Utrecht, The Netherlands
5. Department of Physiology, Favaloro University, Division of Hematology, Thrombosis, and Haemostasis, University Hospital, Favaloro Foundation, Buenos Aires, Argentina
6. Division of Reproductive Endocrinology, Department of Obstetrics and Gynecology, University of Tennessee Health Science Center, Memphis, Tennessee, USA
7. Service de Médecine Interne, Hôpital Claude-Huriez, Centre Hospitalier Régional et Universitaire de Lille, Lille, France
8. Osaka New ART Clinic, Tokai University School of Medicine, Osaka, Japan
9. Division of Rheumatology, Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, USA
10. Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
11. Department of Pathology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, USA
12. Laboratoire d'Immunologie, Hôpital de La Conception, Marseille, France
13. Associated Regional and University Pathologists (ARUP) Institute for Clinical and Experimental Pathology, University of Utah School of Medicine, Salt Lake City, Utah, USA
14. Antiphospholipid Standardization Laboratory, Division of Rheumatology, Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, USA