1Autoimmune Disease Research Unit, Department of Internal Medicine, Hospital de Cruces, University of the Basque Country, Barakaldo, Spain
2Lupus Research Unit, The Rayne Institute, Guy’s, King’s and St Thomas’ School of Medicine, King’s College, London, UK
3Univ Texas Hlth Sci Ctr San Antonio, University of Texas Health Science Center San Antonio, Sch Med, Dept Neurol
4Division of Hematology and Thromboembolism, McMaster University, Canada
5Department of Rheumatology and Clinical Immunology, University Medical Centre Utrecht, The Netherlands
6The Barbara Volcker Center for Women and Rheumatic Disease, Hospital for Special Surgery, Weill Medical College of Cornell University, New York, USA
7Department of Immunology, Allergy & Infectious Disease, St George Hospital, University of New South Wales, Australia
8Department of Haematology, University College London, London, UK
9Clinical Cardiology, University Hospital, Padova, Italy
10Antiphospholipid Standardization Laboratory, Division of Rheumatology, Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA
11First Department of Internal Medicine, Medical School, National University of Athens, Athens, Greece
