1. Department of Rheumatology, University Medical Centre Ljubljana, Ljubljana, Slovenia
2. Department of Clinical Chemistry and Haematology, University Medical Centre Utrecht, Utrecht, The Netherlands
3. Fédération Autoimmunité et Thrombose, Hôpital de la Conception, Marseille, France
4. Department of Medicine ‘B’ and Center for Autoimmune Diseases, The Sheba Medical Center, Research Unit of Autoimmune Diseases, The Sackler Faculty of Medicine, Tel-Aviv University, Tel-Hashomer, Tel Aviv, Israel
5. Allergy, Clinical Immunology and Rheumatology Unit, Department of Internal Medicine, University of Milan, IRCCS Istituto Auxologico Italiano, Milan, Italy
6. Department of Autoimmune Diseases, Hospital Clinic, Barcelona, Catalonia, Spain
7. Clinical Cardiology, Thrombosis Center, Department of Cardiac Thoracic and Vascular Sciences, University of Padova School of Medicine, Padova, Italy
8. Paediatric Rheumatology, Meyer Children’s Hospital and University of Florence, Florence, Italy
9. Children’s Hospital, University Medical Centre Ljubljana, Ljubljana, Slovenia
10. Department of Obstetrics and Gynecology, The Sheba Medical Center, Tel Hashomer, Tel-Aviv University, The Sackler Faculty of Medicine, Tel Aviv, Israel
11. Department of Rheumatology and Clinical Immunology, Brescia Hospital and University of Brescia, Brescia, Italy