1. Department of Internal Medicine—French Reference Center for Systemic Lupus Erythematosus and Antiphospholipid Syndrome, Pitie Salpetriere Hospital Paris France
2. Laboratoire d’immunochimie, Pitie Salpetriere Hospital Paris France
3. Laboratoire d’immunologie tissulaire et cellulaire—INSERM UMR‐S945, Pitie Salpetriere Hospital Paris France
4. Department of Experimental Pathology, Institute for Frontier Medical Sciences, Kyoto University Kyoto Japan
5. WPI Immunology Frontier Research Center, Osaka University Suita Japan